Difference between revisions of "Viruses"
Jump to navigation
Jump to search
(→Epstein-Barr virus: note about 'ebstein') |
(→General: more) |
||
| Line 70: | Line 70: | ||
***[[Esophagus#Human_papilloma_virus_esophagitis|HPV esophagitis]]. | ***[[Esophagus#Human_papilloma_virus_esophagitis|HPV esophagitis]]. | ||
**Malignant: | **Malignant: | ||
** | **#[[Uterine cervix|Cervical cancer]] and precursors ([[LSIL]], [[HSIL]]). | ||
** | **#Anal cancer and precursors ([[Anus#Anal_intraepithelial_neoplasia|AIN]]).<ref name=pmid21616117>{{Cite journal | last1 = Borget | first1 = I. | last2 = Abramowitz | first2 = L. | last3 = Mathevet | first3 = P. | title = Economic burden of HPV-related cancers in France. | journal = Vaccine | volume = 29 | issue = 32 | pages = 5245-9 | month = Jul | year = 2011 | doi = 10.1016/j.vaccine.2011.05.018 | PMID = 21616117 }}</ref> | ||
***Squamous cell carcinoma in the [[Head & neck pathology|head & neck]]. | **#[[Vulva|Vulvar cancer]]].<ref name=pmid21616117/> | ||
**#[[Vagina|Vaginal cancer]].<ref name=pmid21616117/> | |||
**#[[Penis|Penile cancer]].<ref name=pmid21616117/> | |||
**#Squamous cell carcinoma in the oropharynx, i.e. [[Head & neck pathology|head & neck]]. | |||
***Possibly esophageal carcinoma<ref name=pmid21130683>{{Cite journal | last1 = Zhang | first1 = QY. | last2 = Zhang | first2 = DH. | last3 = Shen | first3 = ZY. | last4 = Xu | first4 = LY. | last5 = Li | first5 = EM. | last6 = Au | first6 = WW. | title = Infection and integration of human papillomavirus in esophageal carcinoma. | journal = Int J Hyg Environ Health | volume = 214 | issue = 2 | pages = 156-61 | month = Mar | year = 2011 | doi = 10.1016/j.ijheh.2010.11.001 | PMID = 21130683 }}</ref> - disputed.<ref name=pmid21169053>{{Cite journal | last1 = Iyer | first1 = A. | last2 = Rajendran | first2 = V. | last3 = Adamson | first3 = CS. | last4 = Peng | first4 = Z. | last5 = Cooper | first5 = K. | last6 = Evans | first6 = MF. | title = Human papillomavirus is detectable in Barrett's esophagus and esophageal carcinoma but is unlikely to be of any etiologic significance. | journal = J Clin Virol | volume = 50 | issue = 3 | pages = 205-8 | month = Mar | year = 2011 | doi = 10.1016/j.jcv.2010.11.015 | PMID = 21169053 }}</ref> | |||
Oncocytic types: | Oncocytic types: | ||
Revision as of 18:22, 27 November 2011
This article deals with viruses. The more general topic of infective things is dealt with in microorganisms. Many viruses afflict humans. Only a few of them can be diagnosed histologically.
Viral inclusions - types
Cowdry types:[1]
- Cowdry type A inclusion:[2]
- Round eosinophilic material surrounded by a clear halo.
- Cowdry type B inclusion:[3]
- Neuropathology thingy. (???)
Images:
Viruses
Herpes simplex virus
- Abbreviated HSV.
General
Several subtypes:
- Canker sores - usually HSV-1.
- Genital herpes - usually HSV-2.
Histology/cytology
Features:[4]
- Clear "ground glass" nuclei.
- Rim of peripheral chromatin.
- Nuclear inclusions.
- Multinucleation with nuclear molding, i.e. multiple nuclei that touch over a large surface area.
Mnemonic - 3 Ms: Margination, Multinucleation, Molding.
Images:
- Herpes simplex virus - multinucleation (virology.org).
- HSV on a Pap test - showing multinucleation (WC).
- HSV esophagitis - very high mag. (WC).
- HSV esophagitis - intermed. mag. (WC).
Cytomegalovirus
- Abbreviated CMV
General
- The name comes from the microscopic appearance.
- One of the TORCH infections.
- May cause fetal hydrops and intracerebral hemorrhage.[5]
Microscopic
Features:
- Very large nucleus (as the name implies) with clearing.
- Granular cytoplasmic inclusions (red on H&E sections).
Notes:
- Classically in endothelial cells.
- In the context of esophageal ulcers, it is therefore useful to biopsy the base of the ulcer - if this is suspected.
Images:
IHC
- IHC for CMV is available - highlights granular cytoplasmic inclusions; increases sensitivity.
Human papilloma virus
- Abbreviated HPV.
General
- Causes a lot of pathology:
- Benign:
- Malignant:
- Cervical cancer and precursors (LSIL, HSIL).
- Anal cancer and precursors (AIN).[6]
- Vulvar cancer].[6]
- Vaginal cancer.[6]
- Penile cancer.[6]
- Squamous cell carcinoma in the oropharynx, i.e. head & neck.
Oncocytic types:
- HPV 18 - predominantly adenocarcinoma.[9]
- Eighteen = adenocarcinoma.
- HPV 16 - predominantly squamous cell carcinoma.[9]
- Sixteen = squamous.
Recombinant vaccine (Gardasil, Silgard) - covers:[10]
- HPV 6.
- HPV 11.
- HPV 16.
- HPV 18.
Microscopic
Features:
- Koilocytes:
- Perinuclear clearing.
- Nuclear changes.
- Size similar (or larger) to those in the basal layer of the epithelium.
- Nuclear enlargement should be evident on low power, i.e. 25x.
- Central location - nucleus should be smack in the middle of the cell.
Images:
IHC
- p16 +ve -- stains most cells infected by HPV.
Adenovirus
General
- Common in kids.
- May be seen in the context of (adenovirus) appendicitis.
Microscopic
Features:
- "Smudge" cells[11] - black/blue blob ~ 10-15 micrometers. (???)
Notes:
Images:
- Adenovirus (medscape.com).[12]
- Smudge cell (medpedia.com).
- Necrosis in germinal centre - low mag. (flickr.com).
- Viral inclusions - high mag. (flickr.com).
- IHC for adenovirus (flickr.com)
Parvovirus
- AKA Parvovirus B19.
General
- Most significant in pregnant women.
- Parvovirus attacks the nucleated RBCs of the fetus - causes an aplastic anemia.
Trivia:
Microscopic
Features:
- Glassy (red) nuclear inclusions.[15]
- Nuclear enlargement.
Images:
- WC:
- www:
Epstein-Barr virus
- Abbreviated EBV
General
- Cases mononucleosis.
- Part of the herpes group of viruses.[18]
Note:
- The virus is Epstein... the tricuspid abnormality is Ebstein.
Associations
Cancer:[19]
- Classical Hodgkin lymphoma.
- Burkitt lymphoma.
- Nasopharyngeal carcinoma.
- B cell lymphomas -- in immunosuppressed individuals.
Microscopic
Features:
- Variable - see specific pathologies in Associations section.
- +/-Atypical lymphocytes.
- +/-Hemophagocytosis (uncommon).
Polyomavirus
May refer to:
- BK virus.
- Merkel cell polyomavirus.
- See: Merkel cell carcinoma.
See also
References
- ↑ URL: http://www.pathconsultddx.com/pathCon/largeImage?pii=S1559-8675%2806%2970864-6&figureId=fig3&ecomponentId=mmc3. Accessed: 12 January 2010.
- ↑ URL: http://www.whonamedit.com/synd.cfm/3495.html. Accessed on: 22 January 2010.
- ↑ http://www.whonamedit.com/synd.cfm/3496.html. Accessed on: 22 January 2010.
- ↑ SM. 11 January 2010.
- ↑ Tongsong, T.; Sukpan, K.; Wanapirak, C.; Phadungkiatwattna, P. (2008). "Fetal cytomegalovirus infection associated with cerebral hemorrhage, hydrops fetalis, and echogenic bowel: case report.". Fetal Diagn Ther 23 (3): 169-72. doi:10.1159/000116737. PMID 18417974.
- ↑ 6.0 6.1 6.2 6.3 Borget, I.; Abramowitz, L.; Mathevet, P. (Jul 2011). "Economic burden of HPV-related cancers in France.". Vaccine 29 (32): 5245-9. doi:10.1016/j.vaccine.2011.05.018. PMID 21616117.
- ↑ Zhang, QY.; Zhang, DH.; Shen, ZY.; Xu, LY.; Li, EM.; Au, WW. (Mar 2011). "Infection and integration of human papillomavirus in esophageal carcinoma.". Int J Hyg Environ Health 214 (2): 156-61. doi:10.1016/j.ijheh.2010.11.001. PMID 21130683.
- ↑ Iyer, A.; Rajendran, V.; Adamson, CS.; Peng, Z.; Cooper, K.; Evans, MF. (Mar 2011). "Human papillomavirus is detectable in Barrett's esophagus and esophageal carcinoma but is unlikely to be of any etiologic significance.". J Clin Virol 50 (3): 205-8. doi:10.1016/j.jcv.2010.11.015. PMID 21169053.
- ↑ 9.0 9.1 De Boer, MA.; Peters, LA.; Aziz, MF.; Siregar, B.; Cornain, S.; Vrede, MA.; Jordanova, ES.; Fleuren, GJ. (Apr 2005). "Human papillomavirus type 18 variants: histopathology and E6/E7 polymorphisms in three countries.". Int J Cancer 114 (3): 422-5. doi:10.1002/ijc.20727. PMID 15551313.
- ↑ McCormack, PL.; Joura, EA. (Oct 2011). "Spotlight on Quadrivalent Human Papillomavirus(Types 6, 11, 16, 18) Recombinant Vaccine(Gardasil®) in the Prevention of PremalignantGenital Lesions, Genital Cancer, and Genital Warts in Women†.". BioDrugs 25 (5): 339-43. doi:10.2165/11205060-000000000-00000. PMID 21942919.
- ↑ URL: http://www.pathguy.com/lectures/infect.htm. Accessed on: 8 July 2010.
- ↑ URL:http://www.medscape.com/viewarticle/438534_2. Accessed on: 8 July 2010.
- ↑ Cossart, YE.; Field, AM.; Cant, B.; Widdows, D. (Jan 1975). "Parvovirus-like particles in human sera.". Lancet 1 (7898): 72-3. PMID 46024.
- ↑ Servey JT, Reamy BV, Hodge J (February 2007). "Clinical presentations of parvovirus B19 infection". Am Fam Physician 75 (3): 373–6. PMID 17304869. http://www.aafp.org/afp/991001ap/1455.html.
- ↑ URL: http://www.pathguy.com/lectures/infect.htm. Accessed on: 8 July 2010.
- ↑ URL:http://info.fujita-hu.ac.jp/~tsutsumi/case/case210.htm. Accessed on: 8 February 2011.
- ↑ URL: http://www.scielo.br/scielo.php?pid=S0036-46652007000200007&script=sci_arttext. Accessed on: 18 August 2011.
- ↑ URL: http://www.meddean.luc.edu/lumen/MedEd/orfpath/herpes.htm. Accessed on: 14 April 2011.
- ↑ Mitchell, Richard; Kumar, Vinay; Fausto, Nelson; Abbas, Abul K.; Aster, Jon (2011). Pocket Companion to Robbins & Cotran Pathologic Basis of Disease (8th ed.). Elsevier Saunders. pp. 169. ISBN 978-1416054542.
- ↑ Jin YK, Xie ZD, Yang S, Lu G, Shen KL (June 2010). "Epstein-Barr virus-associated hemophagocytic lymphohistiocytosis: a retrospective study of 78 pediatric cases in mainland of China". Chin. Med. J. 123 (11): 1426–30. PMID 20819601.