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Medical liver disease (view source)

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[[Image:Ground glass hepatocytes high mag cropped 2.jpg|thumb|right|[[Micrograph]] showing ground glass hepatocytes, as seen in chronic [[hepatitis B]]. [[H&E stain]].]]
This article deals with '''medical [[liver]] disease'''.  An introduction to the liver and approach is found in the ''[[liver]]'' article.
This article deals with '''medical [[liver]] disease'''.  An introduction to the liver and approach is found in the ''[[liver]]'' article.


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Liver neoplasms are dealt with in the ''[[liver neoplasms]]'' article.
Liver neoplasms are dealt with in the ''[[liver neoplasms]]'' article.
Medical liver biopsies are often non-specific, as the liver has the same appearance for many mechanisms of injury, especially when the injury is marked. The clinical history, serology and imaging are essential for proper interpretations in this domain of pathology.
=Review of liver blood work=
===Inflammation activity===
*ALT.
*AST.
===Cholestatic markers===
*ALP.
*GGT - used to assess whether the ALP is an "honest" value, elevated in cirrhosis.
===Cirrhosis/decompensation===
*PLT - low is suggestive of dysfunction.
*INR - high is bad, unless anticoagulated.
===Other===
*Bilirubin.
**Direct (AKA conjugated).
**Indirect (AKA unconjugated).
A short DDx of elevated:<ref>{{Ref PCPBoD8|441}}</ref>
*Indirect:
**[[Gilbert syndrome]].
**Crigler-Najjar syndrome type 1.
**Crigler-Najjar syndrome type 2.
*Direct:
**Rotor syndrome.
**Dubin-Johnson syndomre.
===Viral hepatitis===
*HBV DNA.
*HCV RNA.
*HBs Ag, HBs Ab, HBe Ag, HBe Ab.
*HCV Ab.
Others:
*[[Epstein-Barr virus]] (EBV).
*[[Cytomegalovirus]] (CMV) - especially in the immune incompetent.
====Hepatitis B====
Meaning & utility of the various [[Hepatitis B]] tests:<ref>URL: [http://www.clevelandclinicmeded.com/medicalpubs/diseasemanagement/hepatology/hepatitis-B/ http://www.clevelandclinicmeded.com/medicalpubs/diseasemanagement/hepatology/hepatitis-B/]. Accessed on: 16 May 2011.</ref><ref name=lto_hepb>URL: [http://www.labtestsonline.org/understanding/analytes/hepatitis_b/test.html http://www.labtestsonline.org/understanding/analytes/hepatitis_b/test.html]. Accessed on: 16 May 2011.</ref>
{| class="wikitable sortable" border="1"
! Test name
! Location
! Positive test
! Negative test
! Usual question
|-
| HBs Ag||Surface||Virus active||No active infection||Active infection?
|-
| HBs Ab||Surface||Exposed OR vaccinated||No exposure OR no vaccine OR loss of Ab||Immunization status?
|-
| HBe Ag||Virus core||Infect. w/ viral replication||No active infection||Active infect. w/ viral replication?
|-
| HBe Ab||Virus core||Exposed to virus||Infect. w/o antibody response OR not exposed||Immune response to infection?
|-
| HBV DNA||-||Active||Not active/no exposure||Viral load/how active?
|-
| HBc Ab||Virus core||Virus active/previous exposure||No exposure||Early active infection?
|}
Notes:
*''HBc Ab'' may test for acute (IgM) or chronic infection - dependent on specific antibody test; it is often used to look for early infection.<ref name=lto_hepb>URL: [http://www.labtestsonline.org/understanding/analytes/hepatitis_b/test.html http://www.labtestsonline.org/understanding/analytes/hepatitis_b/test.html]. Accessed on: 16 May 2011.</ref>
*''Carriers of hepatitis B'': HBs Ag +ve, HBs Ab -ve, HBc Ag -ve, HBc Ab +ve, HBe Ag -ve, HBe Ab +ve.<ref>URL: [http://labtestsonline.org/understanding/analytes/hepatitis-b/tab/test http://labtestsonline.org/understanding/analytes/hepatitis-b/tab/test]. Accessed on: 3 May 2012.</ref>
===Markers for rare liver diseases===
*Ceruloplasm - low think ''[[Wilson's disease]]''; typical value for Wilson's ~ 0.12 g/L.
**<0.20 g/L is a criteria for Wilson's disease.<ref name=pmid18556333>Diagnostic accuracy of serum ceruloplasmin in Wilson disease: determination of sensitivity and specificity by ROC curve analysis among ATP7B-genotyped subjects. Mak CM, Lam CW, Tam S. Clin Chem. 2008 Aug;54(8):1356-62. Epub 2008 Jun 12. PMID 18556333. URL: [http://www.clinchem.org/cgi/reprint/54/8/1356.pdf http://www.clinchem.org/cgi/reprint/54/8/1356.pdf]. Accessed on: 28 September 2009.</ref>
*Alpha-1 antitrypsin - if low think ''deficiency''.
===Hemosiderosis===
*Ferritin - high.
*Iron saturation - high.
Causes:
*Hemochromatosis.
*Hemolysis, chronic.
*Cirrhosis.
=Medical imaging=
Blood flow:<ref>URL: [http://insidesurgery.com/2010/12/hepatopedal-hepatofugal-flow/ http://insidesurgery.com/2010/12/hepatopedal-hepatofugal-flow/]. Accessed on: 2 December 2011.</ref>
*Hepatopedal flow = normal portal vein flow.
*Hepatofugal flow = reversed portal vein flow.
==Interventional measurements==
Wedged to free hepatic venous pressure:<ref name=pmid1864548>{{Cite journal  | last1 = Bion | first1 = E. | last2 = Brenard | first2 = R. | last3 = Pariente | first3 = EA. | last4 = Lebrec | first4 = D. | last5 = Degott | first5 = C. | last6 = Maitre | first6 = F. | last7 = Benhamou | first7 = JP. | title = Sinusoidal portal hypertension in hepatic amyloidosis. | journal = Gut | volume = 32 | issue = 2 | pages = 227-30 | month = Feb | year = 1991 | doi =  | PMID = 1864548 | PMC = 1378815 | URL = http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1378815/?tool=pubmed }}</ref>
*Normal = 1-4 mmHg.
**Elevated in [[portal hypertension]].
=Liver biopsy=
==Medical liver biopsy adequacy==
Liver biopsy specimens should be:<ref>{{Ref MacSween|418}}</ref>
*2.0 cm in length and contain 11-15 portal tracts,
*The core should be deeper than 1.0 cm from the liver capsule; specimens close to the capsule may lead to over grading of fibrosis.
==Reporting==
{{Main|Pathology reports}}
<pre>
Specimen, procedure:
- Diagnosis.
</pre>
The diagnosis usually contains grading and staging information, e.g. ''activity 2 /4, Laennec fibrosis stage 1 /4''.
In the context of medical liver disease:
*Grade = inflammation/activity.
*Stage = severity of fibrosis/architectural changes.
Notes:
*The term "acute" is infrequently used in liver pathology.
*In the liver: neutrophils ''is not'' acute -- unlike most elsewhere in the body.<ref>OA. September 2009.</ref>
===A microscopic checklist===
<pre>
Size of biopsy: Adequate
Fragmentation: Absent
Fibrosis: Stage 2-3/4, mostly stage 2
Fibrous septa: Present
Septa with curved contours: Present – focally only
Large droplet steatosis (% of hepatocytes): Present, moderate 60%
Ballooning of hepatocytes: Present, rare
Mallory-Denk bodies: Present, rare
Portal inflammation: Present
Interface activity: Minimal (0-1/4)
Lobular necroinflammation: Minimal
Ducts: Present in normal numbers
Duct injury: Absent
Ductular reaction: Absent
Cholestasis: Absent
Terminal hepatic venules: Present
Iron stain: Absent
Ground glass cells with routine stains: Absent
PASD for alpha-1 antitrypsin droplets: Negative
</pre>


=Viral hepatitis=
=Viral hepatitis=
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==Hepatitis B==
==Hepatitis B==
:''Hepatitis B virus'', abbreviated ''HBV'', redirects here.
:''Hepatitis B virus'', abbreviated ''HBV'', redirects here.
===General===
{{Main|Hepatitis B}}
*May lead to [[hepatocellular carcinoma]] without [[cirrhosis]].
*High prevalence.
*Diagnosis is by serology.
 
Associated pathology:
*[[Polyarteritis nodosa]] (PAN).
*[[Membranoproliferative glomerulonephritis]].
*[[Membranous nephropathy]].
 
===Microscopic===
Features:
*Lobular inflammation - this is non-specific finding.
**Hepatocyte necrosis:
***Necrotic hepatocytes look a lot like neutrophils - however:
****Cytoplasm is more pink.
****Round apoptotic bodies.
*Ground glass hepatocytes - see ''[[liver|liver pathology]]'' article.
 
Image: [http://commons.wikimedia.org/wiki/File:Ground_glass_hepatocytes_high_mag_cropped_2.jpg GGH - high mag. (WC)].
 
DDx:
*[[Hepatitis C]].
*[[Autoimmune hepatitis]].
*[[Primary biliary cirrhosis]] without [[granulomas]].
*Drug reaction.
 
===IHC===
*[[Hepatitis B]] +ve.


==Hepatitis C==
==Hepatitis C==
===General===
{{Main|Hepatitis C}}
*Leads to hepatocellular carcinoma in the setting of cirrhosis.
*Tends to be chronic; the "C" in "hepatitis C" stands for ''chronic''.
*Diagnosis is by serology.
 
Associated pathology:
*[[Membranoproliferative glomerulonephritis]].
*[[Membranous nephropathy]].
*[[Cryoglobulinemia]].
 
===Microscopic===
Features:
*Lobular inflammation - this is non-specific finding.
**Usually Grade 1, rarely Grade 2 and almost never Grade 3 or Grade 4.<ref>STC. 6 December 2010.</ref>
*Periportal steatosis in genotype 3.<ref name=pmid16614743>Yoon EJ, Hu KQ. Hepatitis C virus (HCV) infection and hepatic steatosis. Int J Med Sci. 2006;3(2):53-6. Epub 2006 Apr 1. PMID 16614743. Avialable at: [http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1415843 http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1415843]. Accessed on: September 9, 2009.</ref>
**Steatosis in hepatitis C is usually a secondary pathology, i.e. a separate pathologic process.<ref>OA. September 2009.</ref>
 
DDx:
*[[Hepatitis B]] (without ground glass hepatocytes).
*[[Autoimmune hepatitis]].
*[[Primary biliary cirrhosis]] without granulomas.
*Drug reaction.


=Other infections=
=Other infections=
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Image:Liver_cyst_wall_-_intermed_mag.jpg | Liver cyst wall - intermed. mag. (WC)
Image:Liver_cyst_wall_-_intermed_mag.jpg | Liver cyst wall - intermed. mag. (WC)
Image:Liver_cyst_wall_-_high_mag.jpg | Liver cyst wall - high mag. (WC)
Image:Liver_cyst_wall_-_high_mag.jpg | Liver cyst wall - high mag. (WC)
Image:Laminated_liver_cyst_wall_-_high_mag.jpg | Characteristic laminated portion - high mag. (WC)
Image: Laminated liver cyst wall - intermed mag.jpg | Characteristic laminated portion - intermed. mag. (WC)
Image: Laminated liver cyst wall - high mag.jpg | Characteristic laminated portion - high mag. (WC)
</gallery>
</gallery>
[[www]]:
[[www]]:
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*[http://www.atlas.or.kr/atlas/include/viewImg.html?uid=645 Hydatid cyst (atlas.or.kr)].
*[http://www.atlas.or.kr/atlas/include/viewImg.html?uid=645 Hydatid cyst (atlas.or.kr)].
*[http://casereports.bmj.com/content/2009/bcr.04.2009.1798.full Hydatid cyst (casereports.bmj.com)].
*[http://casereports.bmj.com/content/2009/bcr.04.2009.1798.full Hydatid cyst (casereports.bmj.com)].
==Abscess==
A. [[File:1 ABS 1 680x512px.tif|A process replaces most of the liver parenchyma (20X).]]
<br>
B. [[File:2 ABS 1 680x512px.tif|Fibrinopurulent exudate apposes granulation tissue (200X).]]
<br>
C. [[File:3 ABS 1 680x512px.tif|Neutrophils lie in widened sinusoids (200X)..]]
<br>
D. [[File:4 ABS 1 680x512px.tif|Trichrome shows collagenization of spaces of Disse. Scarring about an abscess or other mass lesion should not be interpreted as reflective of the liver in general (200X).]]
<br>
Abscess. A. A process replaces most of the liver parenchyma. B. Fibrinopurulent exudate apposes granulation tissue. C. Neutrophils lie in widened sinusoids. D. Trichrome shows collagenization of spaces of Disse. Scarring about an abscess or other mass lesion should not be interpreted as reflective of the liver in general (LR 200X).
==Coccidiomycosis==
A. [[File:Coccidiomycosis - 1 - 40X 680x512px shot.tif|500x500px Granulomas at low power]]
<br>
B. [[File:Coccidiomycosis - 1 - 200X 680x513px shot.tif|500x500px Granulomas with centrally crowded cells & lady slipper macrophage nuclei]]
<br>
C. [[File:Coccidiomycosis - 1 - 400X 1369x1024px shot.tif|500x500px Center of previous granuloma showing pyknotic macrophage nuclei]]
<br>
D. [[File:Coccidiomycosis - 1 - GMS 400X 1369x1024px shot.tif|500x500px Four Coccidiomycotic spherules]]
<br>
Coccidiomycosis. A. Note the granulomas in otherwise undisturbed liver (UL). B. Granuloma with centrally crowded cells & lady slipper macrophage nuclei. C. Center of granuloma with pyknotic macrophage nuclei, "necrotizing". D. Organisms on GMS stain.


=Metabolic and toxic=
=Metabolic and toxic=
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===General===
===General===
*Acute and/or chronic liver changes due to excessive [[alcohol]] use - includes:
*Acute and/or chronic liver changes due to excessive [[alcohol]] use - includes:
**''Alcoholic steatohepatitis'' (ASH), [[AKA]] ''alcoholic hepatitis''.<ref>URL: [http://emedicine.medscape.com/article/170539-overview http://emedicine.medscape.com/article/170539-overview]. Accessed on: 3 May 2012.</ref>
**''[[Alcoholic steatohepatitis]]'' (ASH), [[AKA]] ''alcoholic hepatitis''.<ref>URL: [http://emedicine.medscape.com/article/170539-overview http://emedicine.medscape.com/article/170539-overview]. Accessed on: 3 May 2012.</ref>
***Alcoholic hepatitis can be with minimal steatosis.<ref>STC. 6 December 2010.</ref>
***Alcoholic hepatitis can be with minimal steatosis.<ref>STC. 6 December 2010.</ref>
**[[Steatosis]] - classically macrovescicular and centrilobular.
**[[Steatosis]] - classically macrovescicular and centrilobular.
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*Neutrophils (often helpful) -- few other things have PMNs. (???)
*Neutrophils (often helpful) -- few other things have PMNs. (???)
**Neutrophils cluster around cells with Mallory hyaline.  
**Neutrophils cluster around cells with Mallory hyaline.  
====Images====
A. [[File:1 etoh 3 680x512px.tif| Alcoholic hepatitis with Metavir stage IV fibrosis (advanced fibrosis/cirrhosis).]]
<br>
B. [[File:2 etoh 3 680x512px.tif| Alcoholic hepatitis with Metavir stage IV fibrosis (advanced fibrosis/cirrhosis).]]
<br>
C. [[File:3 etoh 3 680x512px.tif| Alcoholic hepatitis with Metavir stage IV fibrosis (advanced fibrosis/cirrhosis).]]
<br>
D. [[File:4 etoh 3 680x512px.tif| Alcoholic hepatitis with Metavir stage IV fibrosis (advanced fibrosis/cirrhosis).]]
<br>
E. [[File:5 etoh 3 680x512px.tif| Alcoholic hepatitis with Metavir stage IV fibrosis (advanced fibrosis/cirrhosis).]]
<br>
F. [[File:6 etoh 3 680x512px.tif| Alcoholic hepatitis with Metavir stage IV fibrosis (advanced fibrosis/cirrhosis).]]
<br>
Alcoholic hepatitis with Metavir stage IV fibrosis (advanced fibrosis/cirrhosis).
A. Trichrome shows relatively non-inflamed fibrous bands, as well as [between green dots] nodules. The lack of regeneration throughout might have precluded a diagnosis of cirrhosis, but stage IV fibrosis under the Metavir system is justified. B. Reticulin shows regenerative nodules [left] with mostly two or more nuclei between black lines juxtaposed to non-regenerative hepatocytes on the right, without piecemeal necrosis. C. Regenerative nodules show occasional neutrophils [red arrow] and cytoplasmic tufts of ballooned cells, sometimes possibly Mallory hyalin [green arrows]. D. Triads (note vein [green arrow], artery [yellow arrow], and interlobular bile duct [blue arrow]) generally showed little or no interface hepatitis, even when expanded by fibrosis and inflamed. E. Occasional foci of spotty necrosis were seen.  F. This edge of an inflamed triads shows neutrophils about proliferated bile ducts [red arrows], as well as Mallory-Denk bodies [blue arrows].
<br>
A. [[File:1 etoh 4 680x512px.tif| Cirrhosis in an alcoholic.]]
<br>
B. [[File:2 etoh 4 680x512px.tif| Cirrhosis in an alcoholic.]]
<br>
C. [[File:3 etoh 4 680x512px.tif| Cirrhosis in an alcoholic.]]
<br>
D. [[File:4 etoh 4 680x512px.tif| Cirrhosis in an alcoholic.]]
<br>
E. [[File:5 etoh 4 680x512px.tif| Cirrhosis in an alcoholic.]]
<br>
F. [[File:6 etoh 4 680x512px.tif| Cirrhosis in an alcoholic.]]
<br>
Definite cirrhosis in an alcoholic. A. Hepatocyte free bands parse tissue, with occasional definite islands [arrows]. B. Trichrome establishes blue fibrosis about isles [arrows]. C. Reticulin stain shows nodules with regeneration, wherein a large proportion of them are at least two nuclei thick [arrows]. D. Bile duct proliferation can be difficult, sometimes mimicking cholangiocarcinoma. Follow the double headed arrows to see how the ductules can be seen to proliferate from a single sources, with all ducts being complete, without necrotic epithelial cells. E. PAS with distase can help, as cholangiocarcinoma generally lacks the red rim of proliferating bile ductules [arrows]; again note the connections that can be made between the ductule openings by the blue double headed arrows. The cyan double headed arrows show general parallelism, consistent with uniform directionality induced by extrinsic force, not a neoplastic spread. F. Trichrome shows the most difficult focus. Double headed arrows display the connectivity seen before of the proliferated bile ductules. Note that numerous pairs of adjacent perpendicular glands without a head to foot appearance are not seen that would indicate the disorderly spread of cholangiocarcinoma.
<br>
A. [[File:1 ALC 2 680x512px.tif|Expanded, inflamed triads with increased bile duct/vascular openings. Mild steatosis (40X).]]
<br>
B. [[File:2 ALC 2 680x512px.tif|Trichrome stain shows periportal fibrosis [red arrowheads] (200X).]]
<br>
C. [[File:3 ALC 2 680x512px.tif|PAS with diastase stain shows proliferated bile ductules [blue arrowheads] in stroma with mixed inflammatory infiltrate (400X)]]
<br>
D. [[File:4 ALC 2 680x512px.tif|Neutrophils about ballooned hepatocyte (satellitosis) [yellow arrowheads]. Councilman bodies [green arrowheads] (400X).]]
<br>
Alcoholic hepatitis without cirrhosis. No history of viral disease. AMA negative. A. Expanded, inflamed triads with increased bile duct/vascular openings. Mild steatosis. B. Trichrome stain shows periportal fibrosis [red arrowheads]. C. PAS with diastase stain shows proliferated bile ductules [blue arrowheads] in stroma with mixed inflammatory infiltrate. D. Neutrophils about ballooned hepatocyte (satellitosis) [yellow arrowheads]. Councilman bodies [green arrowheads].


Notes:
Notes:
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==Steatohepatitis==
==Steatohepatitis==
===General===
{{Main|Steatohepatitis}}
*''Steatohepatitis'' is a label for a set of histopathologic findings.
*Fat accumulation in hepatocytes. 
**It may be a pattern seen in drug toxicity, e.g. methotrexate toxicity.<ref>MG. 22 September 2009.</ref>
 
Etiology:
#Alcohol = alcoholic steatohepatitis (ASH).
#Not alcohol = non-alcoholic steatohepatitis (NASH).
#Drug/toxin.<ref name=pmid12016549>{{Cite journal  | last1 = Farrell | first1 = GC. | title = Drugs and steatohepatitis. | journal = Semin Liver Dis | volume = 22 | issue = 2 | pages = 185-94 | month =  | year = 2002 | doi = 10.1055/s-2002-30106 | PMID = 12016549 }}</ref>
 
Notes:
*Pathologists can comment on the etiology; however, the histomorphology is not distinctive. In other words, ''ASH'' and ''NASH'' are clinical diagnoses.
*''Steatohepatitis'' is a misnomer.  It is '''not''' an ''-itis''; inflammation is '''not''' the (predominant) pathologic process.
 
===Microscopic===
Features:
*Steatosis (usually macrovesicular) - '''key feature'''.
**If less than 10% ... consider alt. diagnosis/disease process.
*Hepatocyte injury:
**Ballooning degeneration - '''key feature''' (see [[liver|introduction to liver]]).
**Mallory bodies.
***Mallory body wannabes: "occasional cytoplasmic clumping".
*+/-''Chicken-wire'' perisinusoidal fibrosis +/- zone III (centrilobular) fibrosis (early).
**Late-stage disease - portal bridging.<ref name=pmid14991537>{{Cite journal  | last1 = Gramlich | first1 = T. | last2 = Kleiner | first2 = DE. | last3 = McCullough | first3 = AJ. | last4 = Matteoni | first4 = CA. | last5 = Boparai | first5 = N. | last6 = Younossi | first6 = ZM. | title = Pathologic features associated with fibrosis in nonalcoholic fatty liver disease. | journal = Hum Pathol | volume = 35 | issue = 2 | pages = 196-9 | month = Feb | year = 2004 | doi =  | PMID = 14991537 }}</ref>
 
Image: [http://commons.wikimedia.org/wiki/File:Steatohepatitis_high_mag.jpg Steatohepatitis (WC)].
 
DDx:
*[[Wilson disease]].
*[[Hepatitis C]].
*[[Drug-induced liver disease]].
 
===Grading steatohepatitis===
Grading inflammation:<ref name=pmid10484010>Nonalcoholic steatohepatitis: a proposal for grading and staging the histological lesions. Brunt EM, Janney CG, Di Bisceglie AM, Neuschwander-Tetri BA, Bacon BR. Am J Gastroenterol. 1999 Sep;94(9):2467-74. PMID 10484010.</ref>
*Grade 1 - steatosis, occasional ballooning degeneration, PMNs.
*Grade 2 - obvious ballooning, obvious PMNs, chronic inflammation.
*Grade 3 - panacinar steatosis.


=Autoimmune=
=Autoimmune=
==Autoimmune hepatitis==
==Autoimmune hepatitis==
*Abbreviated ''AIH''.
{{Main|Autoimmune hepatitis}}
{{Main|Autoimmune hepatitis}}


==Primary biliary cirrhosis==
==Primary biliary cirrhosis==
*Abbreviated PBC.
*Abbreviated PBC.
{{Main|Primary biliary cirrhosis}}


===General===
==Autoimmune hepatitis with obstruction - combined changes==
Epidemiology:
A. [[File:1 AIH OBS 1.tif|Low power shows inflammation; portal triads, lobules, central veins cannot be distinguished (40X).]]
*Female>male (~9:1).<ref>{{Ref DCHH|162}}</ref>
<br>
*Usually middle age.
B. [[File:2 AIH OBS 1.tif|Trichrome shows central venous sclerosis (red arrowhead), periportal fibrosis (green arrowhead), & space of Disse collagenization (yellow arrowhead); juxtaposition of central vein & portal tract indicates collapse, no definite bridging was seen (100X)]]
*Associated with other autoimmune conditions ([[Sjögren syndrome]], progressive systemic sclerosis, [[celiac disease]]).
<br>
 
C. [[File:3 AIH OBS 1.tif|Central vein is inflamed with a rare plasma cell (cyan arrowhead) (400X).]]
Etiology:
<br>
*Autoimmune.
D. [[File:4 AIH OBS 1.tif|Interface hepatitis with plasma cells (yellow arrows) and ballooned hepatocytes (red arrows). Lobule is disorganized (400X).]]
 
<br>
Serology:
E. [[File:5 AIH OBS 1.tif|Proliferating bile ductules (blue arrows) with occasional neutrophils (fucsia arrows), indicative of obstruction, but not acute cholangitis, which requires inflamed bile duct itself, best diagnosed with associated blood vessel (400X).]]
*AMA +ve.<ref name=pmid20955967>{{Cite journal  | last1 = Nguyen | first1 = DL. | last2 = Juran | first2 = BD. | last3 = Lazaridis | first3 = KN. | title = Primary biliary cirrhosis. | journal = Best Pract Res Clin Gastroenterol | volume = 24 | issue = 5 | pages = 647-54 | month = Oct | year = 2010 | doi = 10.1016/j.bpg.2010.07.006 | PMID = 20955967 }}</ref>
<br>
 
F. [[File:6 AIH OBS 1.tif|Rare distorted rosettes with greenish brown strands of bile (left arrow) or bile plugs (right arrow) (400X).]]
Classic presentation:
<br>
*Pruritis.
Patient with SLE and obstructive jaundice that resolved with apparent passage of stone. A. Low power shows inflammation; portal triads, lobules, central veins cannot be distinguished. B. Trichrome shows central venous sclerosis (red arrowhead), periportal fibrosis (green arrowhead), & space of Disse collagenization (yellow arrowhead); juxtaposition of central vein & portal tract indicates collapse, no definite bridging was seen. C. Central vein is inflamed with a rare plasma cell (cyan arrowhead). D. Interface hepatitis with plasma cells (yellow arrows) and ballooned hepatocytes (red arrows). Lobule is disorganized. E. Proliferating bile ductules (blue arrows) with occasional neutrophils (fucsia arrows), indicative of obstruction, but not acute cholangitis, which requires inflamed bile duct itself, best diagnosed with associated blood vessel. F. Rare distorted rosettes with greenish brown strands of bile (left arrow) or bile plugs (right arrow).
 
Pathophysiology:
*Septal bile duct attacked.
 
Treatment:
*Ursodeoxycholic acid.
*May be indication for transplant.
 
===Microscopic===
Features:
*"Florid duct lesion":<ref name=pmid7905494>{{Cite journal  | last1 = Nakanuma | first1 = Y. | last2 = Harada | first2 = K. | title = Florid duct lesion in primary biliary cirrhosis shows highly proliferative activities. | journal = J Hepatol | volume = 19 | issue = 2 | pages = 216-21 | month = Sep | year = 1993 | doi =  | PMID = 7905494 }}</ref>
**Intraepithelial lymphocytes - in bile duct - '''key feature'''.
**Bile duct epithelial cells with eosinophilic cytoplasm.<ref>OA. 11 September 2009.</ref>
*Plasma cells.
*[[Granulomas]] - close to bile duct.
**Seen in classic presentation -- often not present or poorly formed.
*Focal damage (may be missed on biopsy -- due to sampling).
*"Garland" cirrhosis -- has irregular border (unlike in EtOH).
**''Garland'' originally "wreath of flowers" (in French).<ref>[http://dictionary.reference.com/browse/garland http://dictionary.reference.com/browse/garland]</ref>
 
DDx:<ref name=Ref_DCHH163>{{Ref DCHH|163}}</ref>
*[[Sarcoidosis]] (if granulomas present).
*[[Primary sclerosing cholangitis]].
*Viral hepatitis.
*[[Autoimmune hepatitis]].
*Drugs.
*[[Hodgkin's lymphoma]].<ref name=pmid19131796>Vanishing bile duct syndrome and Hodgkin disease: a case series and review of the literature. Pass AK, McLin VA, Rushton JR, Kearney DL, Hastings CA, Margolin JF. J Pediatr Hematol Oncol. 2008 Dec;30(12):976-80. PMID 19131796.</ref>
 
Notes:
*[[PAS stain]] useful for examining basement membrane... which is lost in PBC.
*Lobular inflammation should be minimal.
 
Images:
*[http://commons.wikimedia.org/wiki/File:Primary_biliary_cirrhosis_low_mag.jpg PBC - low magnification (WC)].
*[http://commons.wikimedia.org/wiki/File:Primary_biliary_cirrhosis_intermed_mag.jpg PBC - intermediate magnification (WC)].
*[http://www.gidesigns.net/images/MC-copper-flower-garland-L.jpg Garland - wreath of flowers (gidesigns.net)].
 
====Staging PBC====
PBC is staged according to Ludwig:<ref>PBC. eMedicine.com. URL: [http://emedicine.medscape.com/article/171117-diagnosis http://emedicine.medscape.com/article/171117-diagnosis]. Accessed on: 22 September 2009.</ref>
*Stage 1: Portal - inflammation or bile duct abnormalities.
*Stage 2: Periportal - periportal fibrosis (enlargement of portal tracts) +/- inflammation.
*Stage 3: Septal - septal fibrosis +/-inflammation in septa.
*Stage 4: Cirrhosis - nodules of hepatocytes +/- inflammation.
 
Notes:
*There can be significant variation in staging on biopsy - due to variability of fibrosis in a PBC liver.<ref>J Clin Pathol. 1996 July; 49(7): 556-559. Available at: [http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=500569 http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=500569]. Accessed on: September 22, 2009.</ref>
**"Worst area" in biopsy specimen is used to determine stage.


==Autoimmune hepatitis-primary biliary cirrhosis overlap syndrome==
==Autoimmune hepatitis-primary biliary cirrhosis overlap syndrome==
Line 264: Line 333:
===Microscopic===
===Microscopic===
:See: ''[[autoimmune hepatitis]]'' and ''[[primary biliary cirrhosis]]''.
:See: ''[[autoimmune hepatitis]]'' and ''[[primary biliary cirrhosis]]''.
A. [[File:1 AIH PBC 1 680x512px.tif|Expanded portal tracts with fuzzy edges (40X).]]
<br>
B. [[File:2 AIH PBC 1 680x512px.tif|Interface hepatitis with plasma cells (400X).]]
<br>
C. [[File:3 AIH PBC 1 680x512px.tif|Loose granuloma (400X).]]
<br>
D. [[File:4 AIH PBC 1 680x512px.tif|Damaged bile duct (400X).]]
<br>
AIH/PBC overlap. AMA & ANA positive with Alkaline phosphatase > 2 upper limit of normal & one ALT > 5 times upper limit of normal. A. Expanded portal tracts with fuzzy edges. B. Interface hepatitis with plasma cells. C. Loose granuloma. D. Damaged bile duct.


==Primary sclerosing cholangitis==
==Primary sclerosing cholangitis==
*Abbreviated ''PSC''.
*Abbreviated ''PSC''.
*[[AKA]] ''pericholangitis''; considered a synonym for ''small duct PSC''.<ref>URL: [http://emedicine.medscape.com/article/181889-overview http://emedicine.medscape.com/article/181889-overview]. Accessed on: 25 January 2012.</ref>
{{Main|Primary sclerosing cholangitis}}
===General===
*Strongly associated with [[ulcerative colitis]]; 75-90% of PSC patients have [[inflammatory bowel disease]] (IBD).<ref name=emed_psc_over>Khurana V, Singh T. Primary sclerosing cholangitis. eMedicine.com. URL: [http://emedicine.medscape.com/article/187724-overview http://emedicine.medscape.com/article/187724-overview]. Accessed on: 29 November 2009.</ref>
*Risk for [[cholangiocarcinoma]].<ref name=pmid19668124>{{Cite journal  | last1 = Jesudian | first1 = AB. | last2 = Jacobson | first2 = IM. | title = Screening and diagnosis of cholangiocarcinoma in patients with primary sclerosing cholangitis. | journal = Rev Gastroenterol Disord | volume = 9 | issue = 2 | pages = E41-7 | month =  | year = 2009 | doi =  | PMID = 19668124 }}</ref>
 
Serology:
*p-ANCA (MPO-ANCA) +ve in ~ 90% of cases.<ref name=pmid11492972>{{Cite journal  | last1 = Terjung | first1 = B. | last2 = Worman | first2 = HJ. | title = Anti-neutrophil antibodies in primary sclerosing cholangitis. | journal = Best Pract Res Clin Gastroenterol | volume = 15 | issue = 4 | pages = 629-42 | month = Aug | year = 2001 | doi = 10.1053/bega.2001.0209 | PMID = 11492972 }}</ref>
 
====Diagnosis====
*'''Diagnosed radiologically'''.
*Liver biopsy is rarely useful diagnostically<ref name=emed_psc>Khurana V, Singh T. Primary sclerosing cholangitis. eMedicine.com. URL: [http://emedicine.medscape.com/article/187724-diagnosis http://emedicine.medscape.com/article/187724-diagnosis]. Accessed on: 29 November 2009.</ref> - as the disease may be patchy.
**The utility of the biopsy is staging.
 
====Treatment====
*None very good.
*May be indication for transplant.
 
===Microscopic===
Features:
*Classic: "onion-skinning" - cells layer around the bile ducts; "onion skin" present in approx. 40% of cases.<ref name=medscape_psc>Steele et al. URL: [http://www.medscape.com/viewarticle/552500_6 http://www.medscape.com/viewarticle/552500_6]. Accessed on: 29 November 2009.</ref>
**Not pathognomonic for PSC<ref name=medscape_psc/> - but not too much else looks like this on microscopy (ergo good fellowship exam question).
*+/-Ductopenia.
*+/-Ductal proliferation.
 
DDx:
*Big.
 
Images:
*[http://trialx.com/curetalk/wp-content/blogs.dir/7/files/2011/05/diseases/Primary_Sclerosing_Cholangitis-2.jpg PSC (trialx.com)].<ref>URL: [http://trialx.com/curebyte/2011/07/08/clinical-trials-and-images-of-primary-sclerosing-cholangitis/ http://trialx.com/curebyte/2011/07/08/clinical-trials-and-images-of-primary-sclerosing-cholangitis/]. Accessed on: 1 January 2012.</ref>
*[http://www.onmedica.com/getresource.aspx?resourceid=e398a3f2-e030-40e6-823b-2e8e2cbbe4bb PSC (onmedica.com)].<ref>URL: [http://www.onmedica.com/NewsArticle.aspx?id=d7f992b5-6dee-46c6-8383-bbdfb4528ccc http://www.onmedica.com/NewsArticle.aspx?id=d7f992b5-6dee-46c6-8383-bbdfb4528ccc]. Accessed on: 1 January 2011.</ref>
 
Notes:
*PSC often has minimal inflammation.<ref>STC. 9 December 2010.</ref>
 
====Staging====
Features:<ref>Steele et al. URL: [http://www.medscape.com/viewarticle/552500_6 http://www.medscape.com/viewarticle/552500_6]. Accessed on: 29 November 2009.</ref>
*Stage I - focal portal inflammation, +/- duct abnormalities, no fibrosis.
*Stage II - portal enlargement (fibrosis), +/- inflammation.
*Stage III - bridging fibrosis + [[necrosis]].
*Stage IV - cirrhosis.
 
Notes:
*Similar to PBC staging.


=Hereditary=
=Hereditary=
Line 340: Line 376:
==Hereditary hemochromatosis==
==Hereditary hemochromatosis==
:''For secondary causes see [[secondary hemochromatosis]]''.
:''For secondary causes see [[secondary hemochromatosis]]''.
===General===
{{Main|Hereditary hemochromatosis}}
Epidemiology:
*Genetic defect - ''HFE gene''.<ref name=omim613609>{{OMIM|613609}}</ref>
**One mutation (C282Y mutation) in up to 12.5% of people in populations of northern and central European origin.<ref name=pmid18192769>{{cite journal |author=Weinberg ED |title=Survival advantage of the hemochromatosis C282Y mutation |journal=Perspect. Biol. Med. |volume=51 |issue=1 |pages=98-102 |year=2008 |pmid=18192769 |doi=10.1353/pbm.2008.0001 |url=}}</ref>
**Homozygotes get the disease.<ref name=omim613609>{{OMIM|613609}}</ref>
*Onset in males earlier than females (due to menses).
*Mutation thought to confer survival advantage - several theories (increased resistance to [[TB]], S. typhi vs. decreased iron deficiency/increased iron absorption).<ref name=pmid18192769/>
 
Associated pathology (mnemonic: '''h'''emochromatosis '''c'''an '''c'''ause '''d'''eposits '''a'''nywhere''):<ref>URL: [http://en.wikibooks.org/wiki/USMLE_Step_2_Review http://en.wikibooks.org/wiki/USMLE_Step_2_Review]. Accessed on: 15 March 2012.</ref><ref name=pmid19034258>{{Cite journal  | last1 = Fix | first1 = OK. | last2 = Kowdley | first2 = KV. | title = Hereditary hemochromatosis. | journal = Minerva Med | volume = 99 | issue = 6 | pages = 605-17 | month = Dec | year = 2008 | doi =  | PMID = 19034258 }}</ref>
*Hypogonadism.
*[[Cirrhosis]] and [[HCC]].
*[[Cardiomyopathy]] - [[DCM]] (esp. with ''his63asp'' mutation),<ref name=pmid11040018>{{Cite journal  | last1 = Mahon | first1 = NG. | last2 = Coonar | first2 = AS. | last3 = Jeffery | first3 = S. | last4 = Coccolo | first4 = F. | last5 = Akiyu | first5 = J. | last6 = Zal | first6 = B. | last7 = Houlston | first7 = R. | last8 = Levin | first8 = GE. | last9 = Baboonian | first9 = C. | title = Haemochromatosis gene mutations in idiopathic dilated cardiomyopathy. | journal = Heart | volume = 84 | issue = 5 | pages = 541-7 | month = Nov | year = 2000 | doi =  | PMID = 11040018 }}</ref> may be [[RCM]].
*[[Diabetes mellitus]] (bronze diabetes).
*Arthropathy.<ref name=pmid11148720>{{Cite journal  | last1 = von Kempis | first1 = J. | title = Arthropathy in hereditary hemochromatosis. | journal = Curr Opin Rheumatol | volume = 13 | issue = 1 | pages = 80-3 | month = Jan | year = 2001 | doi =  | PMID = 11148720 }}</ref>
 
Pathophysiology:
*Iron overload -> [[cirrhosis]].
 
===Microscopic===
Features:
*Periportal iron deposition (early).
**Late stage disease has diffuse iron deposition.
*Brown granular - may vaguely look like [[lipofuscin]] on [[H&E]].
 
Notes:
*Iron in the bile ducts and endothelium used to be though specific of hereditary hemochromatosis.<ref>MG. 17 September 2009.</ref>
**It is now thought to just reflect the severity of iron deposition, i.e. if the bile ducts and endothelium have iron - it is severe.
 
DDx - secondary hemochromatosis:
*[[Myelodysplastic syndrome]].
*Chronic hemolysis.
*Alcoholic liver disease; iron deposition common in [[cirrhosis]].
 
Images:
*[http://commons.wikimedia.org/wiki/File:Hemosiderosis_high_mag.jpg Hemosiderosis - iron stain (WC)].
*[http://path.upmc.edu/cases/case77/path.html Hemochromatosis (upmc.edu)].
 
===Stains===
Iron stain +ve -- '''important'''.
*Light blue haze is not enough.
**Must be separated from ''siderosis'' -- iron in Kupffer cells.
 
===Molecular===
*PCR - '''diagnostic''' - see ''[[molecular pathology tests]]''.


==Wilson disease==
==Wilson disease==
===General===
{{Main|Wilson's disease}}
Epidemiology:
*Rare autosomal recessive - mutation in copper-transporting adenosine triphosphatase (ATPase) gene (ATP7B).<ref name=emedicine183456>[http://emedicine.medscape.com/article/183456-overview http://emedicine.medscape.com/article/183456-overview]</ref><ref name=omim606882>{{OMIM|606882}}</ref>
**Heterozygote carrier rate approximately 1/100 persons.<ref name=emedicine183456/>
*Young individuals - usually 12-23 years old.
 
Clinical:
*Kayser-Fleischer rings --> on slit-lamp examination (green eyes).
*May present to psychiatry or appear to be abusing EtOH.
*Serum ceruloplasmin - lower than normal.
 
Etiology:
*Excess copper -- due to genetic defect.
 
===Microscopic===
Features:
*Nothing specific - known as the great mimicker of live pathology.
*[[Steatosis of the liver|Steatosis]].
*Portal fibrosis.
 
===Stains===
*Copper staining positive - '''only 15% of cases'''.
**Other stains: rhodinine (red/orange granules = positive), orecin.
 
Notes:
*Copper staining is a non-specific finding seen in many liver diseases; it is associated with impaired bile secretion.<ref name=pmid2464523>{{cite journal |author=Miyamura H, Nakanuma Y, Kono N |title=Survey of copper granules in liver biopsy specimens from various liver abnormalities other than Wilson's disease and biliary diseases |journal=Gastroenterol. Jpn. |volume=23 |issue=6 |pages=633–8 |year=1988 |month=December |pmid=2464523 |doi= |url=}}</ref>
 
===Additional testing===
*Mass spectrometry - determine portion of copper.


==Alpha-1 antitrypsin deficiency==
==Alpha-1 antitrypsin deficiency==
*[[AKA]] ''alpha1-antiprotease inhibitor deficiency''.
*[[AKA]] ''alpha1-antiprotease inhibitor deficiency''.
===General===
{{Main|Alpha-1 antitrypsin deficiency }}
Etiology:
*Genetic defect.
**Prevalence 1 in 2000-5000.<ref name=pmid21960536>{{Cite journal  | last1 = Stoller | first1 = JK. | last2 = Aboussouan | first2 = LS. | title = A Review of Alpha-1 Antitrypsin Deficiency. | journal = Am J Respir Crit Care Med | volume =  | issue =  | pages =  | month = Sep | year = 2011 | doi = 10.1164/rccm.201108-1428CI | PMID = 21960536 }}
</ref>


Causes:
=Other=
*Lung and liver injury.
==Primary Systemic Sclerosis==
**Lung -> panlobular [[emphysema]].
[[File:5 05168051 sl 1.png |Primary systemic sclerosis in the liver]]
 
[[File:5 05168051 sl 2.png |Primary systemic sclerosis in the liver]]
===Microscopic===
[[File:5 05168051 sl 3.png |Primary systemic sclerosis in the liver]]
Features:
[[File:5 05168051 sl 4.png |Primary systemic sclerosis in the liver]]
*Pink globules in zone 1 (periportal).
[[File:5 05168051 sl 5.png |Primary systemic sclerosis in the liver]]
**Globules ''not'' seen in children.
[[File:5 05168051 sl 6.png |Primary systemic sclerosis in the liver]]
**May ''not'' be present in late stage (cirrhotic).
<br>
**Best seen on [[PASD stain]].
Primary systemic sclerosis in a 67 year old White, non-Hispanic man who had undergone renal transplantation for idiopathic nodular glomerusclerosis, which had recurred in 2013. He had been scheduled to receive a second transplantation, but had not yet received one. The patient had a positive anti-nuclear antigen study, with a positive scleroderma antibody (SCL-70), a high SCL-70 antibody index of 3.9, and negative DNA, Chromatin, Anti-Riboscomal P, SS-A, SS-B, anti Smith, RNP, JO-1, anticentromere antibody and rheumatoid factor serologic studies. Hepatitis A, B, and C serologic studies were negative. Liver function tests showed normal albumin and total bilirubin levels with alkaline phosphatase of 712 IU/L (35-129 normal range), alanine aminotransferase 59 IU/L (5-41 normal range), and aspartate aminotransferase 68 IU/L (5-37 normal range). This case provisions many of the features known to be present in primary systemic sclerosis as seen in the skin. A. At low power, triads appear almost as white ghosts against a relatively normal set of hepatocyte lobules. B. Closer examination reveals some triads to be expanded, with peripheral bile ductular proliferation and modest associated chronic inflammation without interface hepatitis. C. Portal arterioles had thick walls; inflammation included lymphocytes and occasional plasma cells. D. Trichrome failed to stain the material in the triads blue, but did show space of Disse collagenization. E. PAS with diastase showed positive staining of the material with emphasis on the arteriole walls. F. Hemosiderosis was seen on iron stain.  
**Can be seen on H&E -- if one looks carefully.
 
Note:
*The pink globules may be seen in the context of cirrhosis; cases should be confirmation with IHC.
 
Images:
*[http://moon.ouhsc.edu/kfung/jty1/opaq/pathquiz/l1k001-pq01.htm A1-AT (ouhsc.edu)].
*[http://www.pathpedia.com/Education/eAtlas/Histopathology/Liver_and_bile_ducts/Alpha-1_antitrypsin_deficiency.aspx A1-AT (pathpedia.com)].
 
===Stains===
*PAS +ve.<ref name=pmid6189389>{{Cite journal  | last1 = Qizilbash | first1 = A. | last2 = Young-Pong | first2 = O. | title = Alpha 1 antitrypsin liver disease differential diagnosis of PAS-positive, diastase-resistant globules in liver cells. | journal = Am J Clin Pathol | volume = 79 | issue = 6 | pages = 697-702 | month = Jun | year = 1983 | doi =  | PMID = 6189389 }}</ref>
*PASD +ve.<ref name=pmid6189389/>


===IHC===
*A1-AT +ve globules.<Ref name=pmid3512609>{{Cite journal  | last1 = Theaker | first1 = JM. | last2 = Fleming | first2 = KA. | title = Alpha-1-antitrypsin and the liver: a routine immunohistological screen. | journal = J Clin Pathol | volume = 39 | issue = 1 | pages = 58-62 | month = Jan | year = 1986 | doi =  | PMID = 3512609 }}</ref>


=Other=
==Budd-Chiari syndrome==
==Budd-Chiari syndrome==
*[[AKA]] ''hepatic vein obstruction''.
*[[AKA]] ''hepatic vein obstruction''.
Line 487: Line 433:
*[[Primary sclerosing cholangitis]].
*[[Primary sclerosing cholangitis]].
*[[GVHD]].<ref name=pmid7994249>{{Cite journal  | last1 = Yeh | first1 = KH. | last2 = Hsieh | first2 = HC. | last3 = Tang | first3 = JL. | last4 = Lin | first4 = MT. | last5 = Yang | first5 = CH. | last6 = Chen | first6 = YC. | title = Severe isolated acute hepatic graft-versus-host disease with vanishing bile duct syndrome. | journal = Bone Marrow Transplant | volume = 14 | issue = 2 | pages = 319-21 | month = Aug | year = 1994 | doi =  | PMID = 7994249 }}</ref>
*[[GVHD]].<ref name=pmid7994249>{{Cite journal  | last1 = Yeh | first1 = KH. | last2 = Hsieh | first2 = HC. | last3 = Tang | first3 = JL. | last4 = Lin | first4 = MT. | last5 = Yang | first5 = CH. | last6 = Chen | first6 = YC. | title = Severe isolated acute hepatic graft-versus-host disease with vanishing bile duct syndrome. | journal = Bone Marrow Transplant | volume = 14 | issue = 2 | pages = 319-21 | month = Aug | year = 1994 | doi =  | PMID = 7994249 }}</ref>
*Drugs.<ref name=pmid11352118>{{Cite journal  | last1 = Chitturi | first1 = S. | last2 = Farrell | first2 = GC. | title = Drug-induced cholestasis. | journal = Semin Gastrointest Dis | volume = 12 | issue = 2 | pages = 113-24 | month = Apr | year = 2001 | doi =  | PMID = 11352118 }}</ref>
*[[Drug-induced liver disease|Drugs]].<ref name=pmid11352118>{{Cite journal  | last1 = Chitturi | first1 = S. | last2 = Farrell | first2 = GC. | title = Drug-induced cholestasis. | journal = Semin Gastrointest Dis | volume = 12 | issue = 2 | pages = 113-24 | month = Apr | year = 2001 | doi =  | PMID = 11352118 }}</ref>
*Chronic rejection.<ref name=pmid11521176>{{Cite journal  | last1 = Inomata | first1 = Y. | last2 = Tanaka | first2 = K. | title = Pathogenesis and treatment of bile duct loss after liver transplantation. | journal = J Hepatobiliary Pancreat Surg | volume = 8 | issue = 4 | pages = 316-22 | month =  | year = 2001 | doi = 10.1007/s0053410080316 | PMID = 11521176 }}</ref>
*Chronic rejection.<ref name=pmid11521176>{{Cite journal  | last1 = Inomata | first1 = Y. | last2 = Tanaka | first2 = K. | title = Pathogenesis and treatment of bile duct loss after liver transplantation. | journal = J Hepatobiliary Pancreat Surg | volume = 8 | issue = 4 | pages = 316-22 | month =  | year = 2001 | doi = 10.1007/s0053410080316 | PMID = 11521176 }}</ref>


Line 499: Line 445:


===IHC===
===IHC===
*CK7 -ve.
*[[CK7]] -ve.
**Marks bile ducts.
**Marks bile ducts.
==Hepatic Graft versus Host Disease (L-GVHD)==
[[File:3 579232643 sl 1.png| Hepatic graft versus host disease (L-GVHD)]]
[[File:3 579232643 sl 2.png| Hepatic graft versus host disease (L-GVHD)]]
[[File:3 579232643 sl 3.png| Hepatic graft versus host disease (L-GVHD)]]
[[File:3 579232643 sl 4.png| Hepatic graft versus host disease (L-GVHD)]]
[[File:3 579232643 sl 5.png| Hepatic graft versus host disease (L-GVHD)]]
[[File:3 579232643 sl 6.png| Hepatic graft versus host disease (L-GVHD)]]
[[File:3 579232643 sl 7.png| Hepatic graft versus host disease (L-GVHD)]]
<br>
Hepatic graft versus host disease (L-GVHD) in a 22 yo man who underwent bone marrow transplantation after developing ALL. A. Low power view shows brownish discoloration in triad, but is otherwise of little interest. B. Arterioles in triads were accompanied by bile ducts in only 30% of cases; this image shows an arteriole without a bile duct. Note the pigment and the accompanying macrophage/lymphocyte inflammation, not extreme. The added chronic inflammation is a feature of chronic L-GVHD. C. Bile ducts, when shown, showed extensive damage, here seen as loss of cytoplasm,  and nuclear pleomorphism and hyperchromasia (other degenerative changes, not seen here, include nuclear dropout or necrosis, cytoplasmic eosinophilia, loss of duct lumen). Lymphocytosis into the ducts was not seen. D. Ballooned hepatocytes and dilated canaliculi were seen. E. Pigment was present, but mostly in Kupffer cells, not hepatocytes or as bile plugs. F. Up to two foci of spotty necrosis were seen in a 100X field (field shown is 200X); not shown are rare apoptotic hepatocytes. G. An iron stain showed the pigment represented extemsive iron deposition, with emphasis on Kupffer cells and portal triad macrophages, frustrating definite assessment of bile plugs in canaliculi. The hemosiderosis resulted from the many blood transfusions the patient had received.
==Extrahepatic biliary obstruction==
A. [[File:1 OBS 3 680x512px.tif|Sinusoidal dilatation, circular spaces of hepatocytes, small portal triads(40X).]]
<br>
B. [[File:2 OBS 3 680x512px.tif|Bile in hepatocytes about central vein & in plugs in canaliculi [yellow arrowhead] (400X).]]
<br>
C. [[File:3 OBS 3 680x512px.tif|Trichrome shows fibrosis about central vein (400X).]]
<br>
D. [[File:4 OBS 3 680x512px.tif|PAS with diastase shows portal triads with mild edema and chronic inflammation, without tortuous bile duct (400X).]]
<br>
Early extrahepatic biliary obstruction, demonstrated radiographically, transient, with rise in bilirubin, alkaline phosphatase, and transaminases. Pure canalicular cholestasis near terminal hepatic venules also seen in acute hepatitis, drug reactions, benign recurrent cholestasis, pregnancy, sepsis, & lymphomas. A. Sinusoidal dilatation, circular spaces of hepatocytes, small portal triads. B. Bile in hepatocytes about central vein & in plugs in canaliculi [yellow arrowhead]. C. Trichrome shows fibrosis about central vein. D. PAS with diastase shows portal triads with mild edema and chronic inflammation, without tortuous bile duct.
<br>
A. [[File:1 OBS 2 680x512px.tif|Expanded inflamed portal triads, swollen hepatocytes (40X)]]
<br>
B. [[File:2 OBS 2 680x512px.tif|Edematous stroma, proliferating ductules [yellow arrowheads], PAS-D macrophages [red arrowhead] (PAS with diastasse, 200X)]]
<br>
C. [[File:3 OBS 2 680x512px.tif|Disordered, often swollen hepatocytes,some with feathery degeneration (net like spaces in cytoplasm [blue arrowhead], rare Councilman body [green arrowhead] (400X)]]
<br>
D. [[File:4 OBS 2 1360x1024px.tif|Bile in hepatocytes [cyan arrrowhead] & in canaliculi [purple arrowheads]. Empty acinar spaces bounded by hepatocytes [orange arrowhead] (400X, higher pixel),]]
<br>
Changes of extrahepatic biliary obstruction, months duration. A. Expanded inflamed portal triads, swollen hepatocytes. B. Edematous stroma, proliferating ductules [yellow arrowheads], PAS-D macrophages [red arrowhead]. C. Disordered, often swollen hepatocytes,some with feathery degeneration (net like spaces in cytoplasm)  [blue arrowhead], rare Councilman body [green arrowhead]. D. Bile in hepatocytes [cyan arrrowhead] & in canaliculi [purple arrowheads]. Empty acinar spaces bounded by hepatocytes [orange arrowhead].
<br>
A. [[File:1 Bd obs 4 680x512px.tif|Expanded, light colored portal triads (arrows)(20X).]]
<br>
B. [[File:2 Bd obs 4 680x512px.tif|Proliferating bile ductules (cyan arrows) with neutrophils (yellow arrows), not specific for acute cholangitis, of assistance with large bile duct obstruction (400X)..]]
<br>
C. [[File:3 Bd obs 4 680x512px.tif|Uninflamed interlobular duct (yellow arrow) with, accompanying blood vessel (red arrow) (400X)]]
<br>
D. [[File:4 Bd obs 4 680x512px.tif|Bile infarct with pyknotic nuclei (arrows)(400X).]]
<br>
E. [[File:5 Bd obs 4 680x512px.tif|Bile (arrow) in interlobular bile duct with disordered nuclei (400X).]]
<br>
F. [[File:6 Bd obs 4 680x512px.tif|Bile plugs in cannaliculi (red arrows), feathery degeneration producing foamy macrophage like hepatocytes (yellow arrows)(400X).]]
<br>
Large bile duct obstruction. A. Expanded, light colored portal triads (arrows). B. Proliferating bile ductules (cyan arrows) with neutrophils (yellow arrows), not specific for acute cholangitis, of assistance with large bile duct obstruction. C. Uninflamed interlobular duct (yellow arrow) with, accompanying blood vessel (red arrow). D. Bile infarct with pyknotic nuclei (arrows). E. Bile (arrow) in interlobular bile duct with disordered nuclei. F. Bile plugs in cannaliculi (red arrows), feathery degeneration producing foamy macrophage-like hepatocytes (yellow arrows).


==Congestive hepatopathy==
==Congestive hepatopathy==
===General===
{{Main|Congestive hepatopathy}}
*Liver failure due to (right) heart failure.
*AKA ''cardiac cirrhosis'' - a term used by clinicians.
**Generally, it does not satisfy pathologic criteria for cirrhosis.<ref>URL: [http://emedicine.medscape.com/article/151792-overview http://emedicine.medscape.com/article/151792-overview]. Accessed on: 17 June 2010.</ref>
 
===Gross===
*"Nutmeg" liver - yellow spotted appearance.
 
===Microscopic===
Features:<ref>URL: [http://emedicine.medscape.com/article/151792-diagnosis http://emedicine.medscape.com/article/151792-diagnosis]. Accessed on: 17 June 2010.</ref>
*Zone III atrophy.
*Portal venule (central vein) distension.
*Perisinusoidal fibrosis - progresses to centrilobular fibrosis and then diffuse fibrosis.
*Dilation of sinusoids in ''all'' zone III areas - '''key feature'''.<ref>Suggested by OA. September 2009.</ref>
 
Image: [http://commons.wikimedia.org/wiki/File:Congestive_hepatopathy_high_mag.jpg Congestive hepatopathy (WC)].


==Drug-induced liver disease==
==Drug-induced liver disease==
{{Main|Drug toxicity}}
*[[AKA]] ''drug-induced liver toxicity''.
*[[AKA]] ''drug-induced liver toxicity''.
===General===
{{Main|Drug-induced liver disease}}
*Drugs can do almost anything; may include: [[granulomata]], bile duct loss, cholestasis, ischemic type injury.
*Effects can be delayed -- temporal relationship not always obvious.
 
===Microscopic===
Features:
*Non-specific findings.
**+/-Eosinophils<ref>{{Ref DCHH|166}}</ref> - '''significant suggestive finding'''.
**+/-Steatosis - periportal macrovesicular, microvesicular.
**+/-[[Vanishing bile duct syndrome]].
**+/-[[Granuloma]]s.
 
Images:
*[http://commons.wikimedia.org/wiki/File:Drug-induced_hepatitis_low_mag.jpg Drug-induced hepatitis - low mag. (WC)].
*[http://commons.wikimedia.org/wiki/File:Drug-induced_hepatitis_intermed_mag.jpg Drug-induced hepatitis - intermed. mag. (WC)].
 
====Specific patterns====
Acute hepatits:
*Related to Rx - most often antibiotics.
 
[[Steatohepatitis]]/[[steatosis]]:<ref name=pmid16237810>{{Cite journal  | last1 = Grieco | first1 = A. | last2 = Forgione | first2 = A. | last3 = Miele | first3 = L. | last4 = Vero | first4 = V. | last5 = Greco | first5 = AV. | last6 = Gasbarrini | first6 = A. | last7 = Gasbarrini | first7 = G. | title = Fatty liver and drugs. | journal = Eur Rev Med Pharmacol Sci | volume = 9 | issue = 5 | pages = 261-3 | month =  | year =  | doi =  | PMID = 16237810 }}</ref>
*Amiodarone - cardiac arrhythmias.
*Tamoxifen - breast cancer.
*Carbamazepine - seizures.
 
====Specific drugs====
Acetaminophen:
*Zone 3 necrosis.
**Tx: N-acetylcysteine (NAC).<ref name=pmid19621836>{{cite journal |author=Millea PJ |title=N-acetylcysteine: multiple clinical applications |journal=Am Fam Physician |volume=80 |issue=3 |pages=265–9 |year=2009 |month=August |pmid=19621836 |doi= |url=}}</ref>
***NAC is an endogenous precursor to glutathione.<ref>URL: [http://www.mskcc.org/mskcc/html/69310.cfm http://www.mskcc.org/mskcc/html/69310.cfm]. Accessed on: 19 October 2010.</ref>
**Hepatotoxicity from ''N-acetyl-p-benzoquinoneimine (NAPQI)'' due to depletion of ''glutathione''.<ref name=pmid19621836>{{cite journal |author=Millea PJ |title=N-acetylcysteine: multiple clinical applications |journal=Am Fam Physician |volume=80 |issue=3 |pages=265–9 |year=2009 |month=August |pmid=19621836 |doi= |url=}}</ref>
 
Methotrexate - chronic use:
*Histology:<ref>{{Ref MacSween|715}}</ref>
**Features of steatohepatitis.
***Zone III steatosis.
***Ballooning degeneration.
**Portal inflammation with mixed population (lymphocytes, macrophages, PMNs).
**Nuclear atypia (hyperchromasia, pleomorphism, vacuolation).
***Described as just nuclear size variation by some.<ref>MG. 23 September 2009.</ref>


==Focal nodular hyperplasia==
==Focal nodular hyperplasia==
*Abbreviated ''FNH''.
*Abbreviated ''FNH''.
===General===
{{Main|Focal nodular hyperplasia}}
*Not commonly seen by pathologists, as these are usually distinctive on medical imaging.<ref name=pmid11274535>{{Cite journal  | last1 = Brancatelli | first1 = G. | last2 = Federle | first2 = MP. | last3 = Grazioli | first3 = L. | last4 = Blachar | first4 = A. | last5 = Peterson | first5 = MS. | last6 = Thaete | first6 = L. | title = Focal nodular hyperplasia: CT findings with emphasis on multiphasic helical CT in 78 patients. | journal = Radiology | volume = 219 | issue = 1 | pages = 61-8 | month = Apr | year = 2001 | doi =  | PMID = 11274535 }}</ref>
*Benign lesions.
*May be seen in the context of [[hereditary hemorrhagic telangiectasia]].<ref name=pmid18814078>{{cite journal |author=Khalid SK, Garcia-Tsao G |title=Hepatic vascular malformations in hereditary hemorrhagic telangiectasia |journal=Semin. Liver Dis. |volume=28 |issue=3 |pages=247–58 |year=2008 |month=August |pmid=18814078 |doi=10.1055/s-0028-1085093 |url=}}</ref>
 
Note:
*Oral contraceptive pill (OCP) use does '''not''' appear to be a factor in the growth of these lesions;<ref name=pmid19751862>{{Cite journal  | last1 = Kapp | first1 = N. | last2 = Curtis | first2 = KM. | title = Hormonal contraceptive use among women with liver tumors: a systematic review. | journal = Contraception | volume = 80 | issue = 4 | pages = 387-90 | month = Oct | year = 2009 | doi = 10.1016/j.contraception.2009.01.021 | PMID = 19751862 }}</ref> however, the study claims there is nothing on [[hepatocellular adenoma]]s -- yet I found a ''JAMA'' paper by Rooks ''et al.''<ref name=pmid221698>{{Cite journal  | last1 = Rooks | first1 = JB. | last2 = Ory | first2 = HW. | last3 = Ishak | first3 = KG. | last4 = Strauss | first4 = LT. | last5 = Greenspan | first5 = JR. | last6 = Hill | first6 = AP. | last7 = Tyler | first7 = CW. | title = Epidemiology of hepatocellular adenoma. The role of oral contraceptive use. | journal = JAMA | volume = 242 | issue = 7 | pages = 644-8 | month = Aug | year = 1979 | doi =  | PMID = 221698 }}</ref> on this topic.
 
====Imaging====
*FNH enhances on the arterial phase in triphasic imaging, i.e. triphasic CT or MRI.<ref name=emedicine_fnh>[http://emedicine.medscape.com/article/368377-overview http://emedicine.medscape.com/article/368377-overview]</ref><ref name=pmid11274535>{{Cite journal  | last1 = Brancatelli | first1 = G. | last2 = Federle | first2 = MP. | last3 = Grazioli | first3 = L. | last4 = Blachar | first4 = A. | last5 = Peterson | first5 = MS. | last6 = Thaete | first6 = L. | title = Focal nodular hyperplasia: CT findings with emphasis on multiphasic helical CT in 78 patients. | journal = Radiology | volume = 219 | issue = 1 | pages = 61-8 | month = Apr | year = 2001 | doi =  | PMID = 11274535 }}</ref>
 
===Gross===
Features:<ref name=Ref_PBoD922>{{Ref PBoD|922}}</ref>
*Well circumscribed, but no capsule.
*Lighter than surrounding parenchyma, may be yellow.
*+/-Stellate central scar with thick vessels.
**Can be identified on medial imaging.
 
Note: Usually a solitary lesion.<ref name=emedicine_fnh/>
===Microscopic===
Features:<ref name=Ref_PBoD922>{{Ref PBoD|922}}</ref>
*Classically a stellate scar that has large arteries with fibromuscular hyperplasia.
**Thin fibrous septa radiate from the central scar - surrounded by lymphocytes & bile ductules.
***Normal hepatocytes between fibrous septae.
 
Practical features:
#Thick walled blood vessels.
#*Bile duct of same size not seen.
#Bile ductular proliferation at the edge of the fibrosis tissue.
#Clinical history: it is a focal lesion.
 
DDx:
*[[Hepatic adenoma]] - may be difficult to distinguish, if no scar and no ductal proliferation.<ref>STC. 19 Jan 2009.</ref>
*Cirrhosis - complete nodules
**FNH has incomplete nodules.
 
Memory device ''FNH'' = '''f'''ocal lesion, '''n'''umerous bile ductules, '''h'''yperplasia of arteries.
 
Images:
*[[WC]]:
**[http://commons.wikimedia.org/wiki/File:Focal_nodular_hyperplasia_-_low_mag.jpg FNH - looks a bit like cirrhosis - low mag. (WC)].
**[http://commons.wikimedia.org/wiki/File:Focal_nodular_hyperplasia_-_intermed_mag.jpg FNH - intermed. mag. (WC)].
**[http://commons.wikimedia.org/wiki/File:Focal_nodular_hyperplasia_-_high_mag.jpg FNH - high mag. (WC)].
*www:
**[http://path.upmc.edu/cases/case444.html FNH - several images (upmc.edu)].


==Nodular regenerative hyperplasia==
==Nodular regenerative hyperplasia==
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Negatives:
Negatives:
*No thrombosis.
*No thrombosis.
==Ascending Cholangitis (Acute Cholangitis)==
===General===
*Term for infection of bile ducts, usually due to obstruction
Clinical DDx:
===Microscopic===
====Images====
A. [[File:1 asc chol 1 680x512px.tif|Rounded, clear (edematous) portal tracts (arrows) separated by hepatocytes with dilated sinusoids (Row 1 Left 40X).]]
<br>
B. [[File:2 asc chol 1 680x512px.tif|Neutrophils about hepatocytes (arrows) have spilled into the lobule from a portal tract (Row 1 Right 200X).]]
<br>
C. [[File:3 asc chol 1 680x512px.tif|Proliferated bile ductules (arrows) bearing neutrophils within epithelium and lumens are features of obstruction that should prompt a search for interlobular ducts with acute inflammation (Row 2 Left 400X).]]
<br>
D. [[File:4 asc chol 1 680x512px.tif|The epithelium of the ducts can be severely degenerated. Neutrophils (cyan arrows) invade epithelium of an interlobular duct that are recognizable mainly as a circle of rounded nuclei; the associated arteriole (red arrow) should be identified to ensure an interlobular duct is being evaluated. Note the proliferated bile ductules (blue arrows)  (Row 2 Right 400X).]]
<br>
E. [[File:5 asc chol 1 680x512px.tif|A PAS without diastase stain colors the arteriole (blue arrow), as well as the rim of the interlobular duct within which lies a neutrophil (cyan arrow) (Row 2 Right 400X). .]]
<br>
F. [[File:6 asc chol 1 680x512px.tif|A PAS with diastase stain colors the arteriole (red arrow), as well as the rim of the interlobular duct within which lies a neutrophil (cyan arrow) (Row 1 Right 400X)]]
<br>
Acute cholangitis in a patient with multiple bile duct procedures. After the biopsy, removal of bile duct stones released pus. A. Rounded, clear (edematous) portal tracts (arrows) separated by hepatocytes with dilated sinusoids. B. Neutrophils about hepatocytes (arrows) have spilled into the lobule from a portal tract. C, Proliferated bile ductules (arrows) bearing neutrophils within epithelium and lumens are features of obstruction that should prompt a search for interlobular ducts with acute inflammation. D. The epithelium of the ducts can be severely degenerated. Neutrophils (cyan arrows) invade epithelium of an interlobular duct that are recognizable mainly as a circle of rounded nuclei; the associated arteriole (red arrow) should be identified to ensure an interlobular duct is being evaluated. Note the proliferated bile ductules (blue arrows). E. A PAS without diastase stain colors the arteriole (blue arrow), as well as the rim of the interlobular duct within which lies a neutrophil (cyan arrow). F. A PAS with diastase stain colors the arteriole (red arrow), as well as the rim of the interlobular duct within which lies a neutrophil (cyan arrow).
A.[[File:1 Sep Acu Cho 1 680x512px.tif|Low power shows variably sized inflamed portal tracts (40X)]]
<br>
B. [[File:2 Sep Acu Cho 1 680x512px.tif|Trichrome shows dilated sinusoids and space of Disse collagenization (200X)]]
<br>
C. [[File:3 Sep Acu Cho 1 680x512px.tif|Inflammatory focus with macrophages and neutrophils (400X).]]
<br>
D. [[File:4 Sep Acu Cho 1 680x512px.tif|PAS with diastase shows proliferated bile ductules at edge of triad with neutrophils, which should not be used to make a definite diagnosis of acute cholangitis (400X).]]
<br>
E. [[File:5 Sep Acu Cho 1 680x512px.tif|PAS without diastase showing acutely inflamed bile duct, with accompanying blood vessel of similar size, diagnostic of acute cholangitis (400X).]]
<br>
F. [[File:6 Sep Acu Cho 1 680x512px.tif|PAS with diastase showing neutrophil in bille duct lumen, diagnostic of acute cholangitis (400X).]]
<br>
Patient with sepsis and acute cholangitis. A. Low power shows variably sized inflamed portal tracts. B. Trichrome shows dilated sinusoids and space of Disse collagenization. C. Inflammatory focus with macrophages and neutrophils. D. PAS with diastase shows proliferated bile ductules at edge of triad with neutrophils, which should not be used to make a definite diagnosis of acute cholangitis. E. PAS without diastase showing acutely inflamed bile duct, with accompanying blood vessel of similar size, diagnostic of acute cholangitis. F. PAS with diastase showing neutrophil in bille duct lumen, diagnostic of acute cholangitis.


==Polycystic kidney disease and the liver==
==Polycystic kidney disease and the liver==
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==Peliosis hepatis==
==Peliosis hepatis==
===General===
{{Main|Peliosis hepatis}}
*Associated with:
**Infections.
**Malignancy.
**Other stuff.
*Rarely biopsied.
 
===Microscopic===
Features:
*Cyst lined by endothelium.
**Usu. incomplete.
*Blood.


==Total parenteral nutrition==
==Total parenteral nutrition==
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*[[Fibrolamellar hepatocellular carcinoma]].
*[[Fibrolamellar hepatocellular carcinoma]].


Images:
====Images====
*[http://commons.wikimedia.org/wiki/File:Hepatic_amyloidosis_-_low_mag.jpg Amyloidosis of the liver - low mag. (WC)].
<gallery>
*[http://commons.wikimedia.org/wiki/File:Hepatic_amyloidosis_-_high_mag.jpg Amyloidosis of the liver - high mag. (WC)].
Image:Hepatic_amyloidosis_-_low_mag.jpg | Amyloidosis of the liver - low mag. (WC)
Image:Hepatic_amyloidosis_-_intermed_mag.jpg | Amyloidosis of the liver - intermed. mag. (WC)
Image:Hepatic_amyloidosis_-_high_mag.jpg | Amyloidosis of the liver - high mag. (WC)
Image:Hepatic_amyloidosis_-_very_high_mag.jpg | Amyloidosis of the liver - very high mag. (WC)
</gallery>
A. [[File:1 AMY 1 680x512px.tif|Amorphous material replaces hepatic parenchyma [4X]]]
<br>
B. [[File:2 AMY 1 680x512px.tif|Material barely stains blue on trichrome [10X]]]
<br>
C. [[File:3 AMY 1 680x512px.tif|Material stains red on unpolarized Congo Red [40X]]]
<br>
D. [[File:4 AMY 1 680x512px.tif|Material stains apple green on polarized Congo Red [40X]]]
<br>
Amyloidosis. A. Amorphous material replaces hepatic parenchyma. B. Material barely stains blue on trichrome. C. Material stains red on unpolarized Congo Red. D. Material stains apple green on polarized Congo Red.


===Stains===
===Stains===
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==Fulminant hepatic necrosis==
==Fulminant hepatic necrosis==
===General===
{{Main|Fulminant hepatic necrosis}}
Etiology:
*Viral, i.e. [[Hepatitis A]], [[Hepatitis B]]; [[Hepatitis C]] - extremely rare.
*Trauma.
*Shock.
 
===Microscopic===
Features:
*Hepatocyte [[necrosis]].
*Bile duct proliferation.
 
DDx:
*[[Cholangiocarcinoma]].
*[[Angiosarcoma]].


==Secondary hemochromatosis==
==Secondary hemochromatosis==
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===Microscopic===
===Microscopic===
:See ''[[hereditary hemochromatosis]]''.
:See ''[[hereditary hemochromatosis]]''.
==Hepatic sarcoidosis==
{{Main|Hepatic sarcoidosis}}
==Overlapping Disorders==
[[File:1 Mixed Disorder 1 680x512px.tif|Changes of steatohepatitis and interface hepatitis, with granuloma. Patient with diabetes was ANA, AMA, HCV, HBV negative, without drugs known to produce granulomas or interface hepatitis. This may be a case of AMA negative primary biliary cirrhosis, but studies to determine that with certainty were not performed.]]
[[File:2 Mixed Disorder 1 680x512px.tif|Changes of steatohepatitis and interface hepatitis, with granuloma. Patient with diabetes was ANA, AMA, HCV, HBV negative, without drugs known to produce granulomas or interface hepatitis. This may be a case of AMA negative primary biliary cirrhosis, but studies to determine that with certainty were not performed.]]
[[File:3 Mixed Disorder 1 680x512px.tif|Changes of steatohepatitis and interface hepatitis, with granuloma. Patient with diabetes was ANA, AMA, HCV, HBV negative, without drugs known to produce granulomas or interface hepatitis. This may be a case of AMA negative primary biliary cirrhosis, but studies to determine that with certainty were not performed.]]
[[File:4 Mixed Disorder 1 680x512px.tif|Changes of steatohepatitis and interface hepatitis, with granuloma. Patient with diabetes was ANA, AMA, HCV, HBV negative, without drugs known to produce granulomas or interface hepatitis. This may be a case of AMA negative primary biliary cirrhosis, but studies to determine that with certainty were not performed.]]
[[File:5 Mixed Disorder 1 680x512px.tif|Changes of steatohepatitis and interface hepatitis, with granuloma. Patient with diabetes was ANA, AMA, HCV, HBV negative, without drugs known to produce granulomas or interface hepatitis. This may be a case of AMA negative primary biliary cirrhosis, but studies to determine that with certainty were not performed.]]
[[File:6 Mixed Disorder 1 680x512px.tif|Changes of steatohepatitis and interface hepatitis, with granuloma. Patient with diabetes was ANA, AMA, HCV, HBV negative, without drugs known to produce granulomas or interface hepatitis. This may be a case of AMA negative primary biliary cirrhosis, but studies to determine that with certainty were not performed.]]<br>
Changes of steatohepatitis and interface hepatitis, with granuloma. Patient with diabetes was ANA, AMA, HCV, HBV negative, without drugs known to produce granulomas or interface hepatitis. This may be a case of AMA negative primary biliary cirrhosis, but studies to determine that with certainty were not performed. A. Low power shows hepatocytes afflicted by steatosis and an inflamed portal tract. B. In a region of fatty change lie cytoplasmic tufts of ballooning degeneration (green arrows) and a lipogranuloma (black arrow). C. At the portal-hepatocyte junction lies interface hepatitis (black arrows), as well as extension of inflammation into the lobule (green arrows). D. Red hepatocytes bounded by inflammation denote piecemeal necrosis [PAS without diastase]. E. Giant cells intermixed with lymphocytes prove a portal granuloma [PAS without diastase]. F. A blue fibrous bridge extends from a triad [Trichrome].
[[File:4 95599552608917 sl 1.png|Acute obstructive changes and changes of recurrent acute injury]]
[[File:4 95599552608917 sl 2.png|Acute obstructive changes and changes of recurrent acute injury]]
[[File:4 95599552608917 sl 3.png|Acute obstructive changes and changes of recurrent acute injury]]
[[File:4 95599552608917 sl 4.png|Acute obstructive changes and changes of recurrent acute injury]]
[[File:4 95599552608917 sl 5.png|Acute obstructive changes and changes of recurrent acute injury]]
[[File:4 95599552608917 sl 6.png|Acute obstructive changes and changes of recurrent acute injury]]
[[File:4 95599552608917 sl 7.png|Acute obstructive changes and changes of recurrent acute injury]]<br>
Acute obstructive changes and changes of recurrent injury in 46 yo man with Clostridium perfringens positive blood culture, an ERCP that showed duodenal compression by the pancreas with resultant bile duct dilatation. The patient had had and continued to have multiple bouts of acute pancreatitis. At the time of biopsy,  decreased platelet count/hemoglobin/albumin, elevated lipase/amylase/PT/PTT, normal alkaline phosphatase, bilirubin, AST/ALT, AMA, hepatitis virus serology, ANA. A. Fragment biopsy shows inflamed triads and bridges. B. Trichrome shows bridges without nodules, evidence of prior injury; the patient subsequently developed multiple episodes of pancreatitis. C. Reticulin shows piecemeal necrosis, with black lines bounding individual hepatocytes at interface (arrows). D. Collapse is shown by closly approximated thick black lines; one cannot call portal-central collapse without seeing a central vein. Note on this and the other reticulin image that regeneration, two cell thick cords, is not prominent. E. PAS D of two portal triads, far nearer than normal, both expanded. Note increased number of ducts/ductules (red arrows), neutrophils, and PAS-D macrophages. F. PAS D shows collapse extending from a triad to a portion of a lobule with steatosis. No feathery degeneration or bile duct plugs were seen. Neither were foci of spotty necrosis or abscess seen. G. Other triads, again edematous, showed more of a chronic inflammatory response, with occasional plasma cells (black arrows). Also present are neutrophils (red arrows). The bile duct (grey arrow)  near the artery (brown arrow) shows mildly disturbed nuclei. Note early proliferated bile ductules (cyan arrows).
[[File:6 17281676469188 sl 1.png| Hepatitis B virus with steatohepatitis]]
[[File:6 17281676469188 sl 2.png| Hepatitis B virus with steatohepatitis]]
[[File:6 17281676469188 sl 3.png| Hepatitis B virus with steatohepatitis]]
[[File:6 17281676469188 sl 4.png| Hepatitis B virus with steatohepatitis]]
[[File:6 17281676469188 sl 5.png| Hepatitis B virus with steatohepatitis]]
[[File:6 17281676469188 sl 6.png| Hepatitis B virus with steatohepatitis]]<br>
Hepatitis B virus with steatohepatitis in a 36 year old man with hepatitis B surface antigen and hepatitis Be antigen positivity, Hepatitis be QTPC of 1750 cop/mL, an occasionally mildly elevated (42) ALT, and  normal glucose, alkaline phosphatase, bilirubin, and other transaminases. He had a history of alcohol abuse, which became controlled.  A. Triads show scant inflammation without definite interface hepatitis. About one-fourth of the lobule, not pan-acinar, is afflicted by steatosis. B. Occasional tufts are seen (arrow), indicating focal ballooning sufficient for a diagnosis of steatohepatitis. C. Glycogenated nuclei (black arrows) and hepatocytes with feathery degeneration (red arrows) are seen.  D. Very rare foci of spotty necrosis were seen. E. Apart from this triad and the one in the trichrome stain in F, which had moderate inflammation comprising lymphocytes and macrophages, all triads were small, most without any inflammation at all. Neither collapse nor piecemeal necrosis were seen on reticulin stain.  F. Trichrome stain showed only portal fibrosis. The interhepatocyte fibrosis required for brunt fibrosis stage I was not seen. Hence, one would grade this as follows: A) Chronic hepatitis (history of hepatitis B), Metavir activity index 1, Piecemeal necrosis 0, Lobular necrosis 1, Metavir fibrosis stage 1, B) Steatohepaitits, Brunt necroinflammatory grade 1, Brunt fibrosis stage 0.


=See also=
=See also=
Line 772: Line 720:
[[Category:Gastrointestinal pathology]]
[[Category:Gastrointestinal pathology]]
[[Category:Liver pathology]]
[[Category:Liver pathology]]
[[Category:Medical liver disease]]
Michael
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