Primary biliary cholangitis

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Primary biliary cholangitis
Diagnosis in short

Primary biliary cirrhosis. H&E stain.
LM "florid duct lesion": intraepithelial lymphocytes - in bile duct, bile duct epithelial cells with eosinophilic cytoplasm; plasma cells; +/-granulomas (close to bile duct); +/-"garland" cirrhosis -- has irregular border
LM DDx sarcoidosis, primary sclerosing cholangitis, viral hepatitis, autoimmune hepatitis, drug-induced liver disease, Hodgkin's lymphoma
Site liver - see medical liver diseases
Associated Dx other autoimmune conditions, e.g. celiac disease, Sjögren syndrome
Clinical history woman, middle age
Symptoms pruritis
Blood work AMA +ve

Primary biliary cirrhosis, abbreviated PBC, is a rare medical liver disease.

General

Epidemiology:

Etiology:

  • Autoimmune.

Serology:

Classic presentation:

  • Pruritis.

Pathophysiology:

  • Septal bile duct attacked.

Treatment:

  • Ursodeoxycholic acid.
  • May be indication for transplant.

Microscopic

Features:

  • "Florid duct lesion":[3]
    • Intraepithelial lymphocytes - in bile duct - key feature.
    • Bile duct epithelial cells with eosinophilic cytoplasm.[4]
  • 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).[5]

Notes:

DDx:[7]

Images

  • PBC - low mag. (WC)

  • PBC - intermed. mag. (WC)

  • PBC - intermed. mag. (WC)

www:

Inflamed triads [arrows] amid undisturbed hepatocytes (Row 1 Left 40X).Granuloma in portal triad (Row 1 Right 400X).
Florid duct lesion (Row 2 Left 400X).Triad missing interlobular bile duct (Row 2 Right 400X).

Primary biliary cirrhosis. Inflamed triads [arrows] amid undisturbed hepatocytes (Row 1 Left 40X). Granuloma in portal triad (Row 1 Right 400X). Florid duct lesion (Row 2 Left 400X). Triad missing interlobular bile duct (Row 2 Right 400X).

Ill defined triads, inflamed lobule (40X).Triad without a bile duct. Macrophages & occasional lymphocytes without epithelioid cells needed for granuloma and space where bile duct likely once was [cyan arrowhead] (400X).
PAS without diastase shows triad lacking bile duct and piecemeal necrosis (200X).PAS with diastase shows bile duct/proliferating bile ductules with epithelial injury and hepatocytes with ballooning degeneration (400X).
Trichrome shows space of Disse collagenization and periportal fibrosis without definite bridging (100X)..Iron stain shows isolated focus of hepatocytes with cytoplasmic blue granules (200X)

Primary biliary cirrhosis. AMA positive. Viral serology/ANA negative. No definite granulomas. Ill defined triads, inflamed lobule (Row 1 Left 40X). Triad without a bile duct. Macrophages & occasional lymphocytes without epithelioid cells needed for granuloma and space where bile duct likely once was [cyan arrowhead] (Row 1 Right 400X). PAS without diastase shows triad lacking bile duct and piecemeal necrosis (Row 2 Left 200X). PAS with diastase shows bile duct/proliferating bile ductules with epithelial injury and hepatocytes with ballooning degeneration (Row 2 Right 400X). Trichrome shows space of Disse collagenization and periportal fibrosis without definite bridging (Row 3 Left 100X). Iron stain shows isolated focus of hepatocytes with cytoplasmic blue granules (Row 3 Right 200X).

Two inflamed triads accompany acini with mild steatosis (20X).A triad bears a poorly formed granuloma [yellow arrowhead]. A bile duct is also seen [red arrowhead] (200X).
A triad lacks a bile duct (200X).Trichrome of the same triad shows portal fibrosis (200X).

Primary biliary cirrhosis. Two inflamed triads accompany acini with mild steatosis (Row 1 Left 20X). A triad bears a poorly formed granuloma [yellow arrowhead]. A bile duct is also seen [red arrowhead] (Row 1 Right 200X). A triad lacks a bile duct (Row 2 Left 200X). Trichrome of the same triad shows portal fibrosis (Row 2 Right 200X).

Acini & lobules distorted by inflammationLoose granuloma in triad without duct
Well-formed granulomaPiecemeal necrosis, PAS without diastase
Damaged bile duct, PAS with diastaseBridging fibrosis, trichrome

Primary biliary cirrhosis with bridging fibrosis. Acini & lobules distorted by inflammation (Row 1 Left 40X) Loose granuloma in triad without duct (Row 1 Right 200X) Well-formed granuloma (Row 2 Left 200X) Piecemeal necrosis, PAS without diastase (Row 2 Right 200X) Damaged bile duct, PAS with diastase (Row 3 Left 400X) Bridging fibrosis, trichrome (Row 3 Right,200X)

Staging PBC

PBC is staged according to Ludwig:[9]

  • 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.[10]
    • "Worst area" in biopsy specimen is used to determine stage.

See also

References

  1. ↑ Tadrous, Paul.J. Diagnostic Criteria Handbook in Histopathology: A Surgical Pathology Vade Mecum (1st ed.). Wiley. pp. 162. ISBN 978-0470519035.
  2. ↑ Nguyen, DL.; Juran, BD.; Lazaridis, KN. (Oct 2010). "Primary biliary cirrhosis.". Best Pract Res Clin Gastroenterol 24 (5): 647-54. doi:10.1016/j.bpg.2010.07.006. PMID 20955967.
  3. ↑ Nakanuma, Y.; Harada, K. (Sep 1993). "Florid duct lesion in primary biliary cirrhosis shows highly proliferative activities.". J Hepatol 19 (2): 216-21. PMID 7905494.
  4. ↑ OA. 11 September 2009.
  5. ↑ http://dictionary.reference.com/browse/garland
  6. ↑ Grimm, D.; Thimme, R. (Apr 2011). "[Cholestatic liver diseases].". Ther Umsch 68 (4): 195-9. doi:10.1024/0040-5930/a000150. PMID 21452140.
  7. ↑ Tadrous, Paul.J. Diagnostic Criteria Handbook in Histopathology: A Surgical Pathology Vade Mecum (1st ed.). Wiley. pp. 163. ISBN 978-0470519035.
  8. ↑ 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.
  9. ↑ PBC. eMedicine.com. URL: http://emedicine.medscape.com/article/171117-diagnosis. Accessed on: 22 September 2009.
  10. ↑ J Clin Pathol. 1996 July; 49(7): 556-559. Available at: http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=500569. Accessed on: September 22, 2009.
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