Difference between revisions of "Ampulla of Vater"
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====Intestinal ampullary carcinoma==== | ====Intestinal ampullary carcinoma==== | ||
Features:<ref name=pmid23026934/> | Features:<ref name=pmid23026934/> | ||
*Pseudostratified columnar epithelium with hyperchromatic, ellipsoid nuclei | *Pseudostratified columnar epithelium with hyperchromatic, ellipsoid nuclei. | ||
**Similar to [[colorectal adenocarcinoma]]. | |||
====Pancreatobiliary ampullary carcinoma==== | ====Pancreatobiliary ampullary carcinoma==== | ||
Revision as of 00:08, 17 October 2012
The ampulla of Vater, also hepatopancreatic ampulla, is found in the duodenum. It has a unique histology and is a relatively common site of disease, when duodenal pathology is considered.
Normal histology
Periampullary:[1]
- Intestinal epithelium with goblet cells.
Papilla of Vater (the projection into the duodenal lumen):[1]
- Goblet cells in foveolar-like epithelium.
Note about heterotopias:[2]
- +/-Pancreatic heterotopia - common.
- +/-Gastric heterotopia - not common.
Ampullary tumours
Ampullary adenoma
General
- Uncommon.
- May be associated with familial adenomatous polyposis (FAP).
Microscopic
Features:
- +/-Paneth cells - may be prominent.[3]
- Similar to adenoma of colon - with:
- Less pseudostratification.
- Finer chromatin pattern.
DDx:
- Ampullary carcinoma.
- Duodenal carcinoma secondarily involving the ampulla.
- Pancreatic adenocarcinoma secondarily involving the ampulla.
Sign out
- See tubular adenoma.
Ampullary carcinoma
- AKA ampullary adenocarcinoma.
General
- Uncommon.
- Textbook association: familial adenomatous polyposis.[4][5]
Classification
Adsay et al. proposed a four subtype classification system:[1]
| Subtype | Prevalence | Origin/definition | Subclassification |
|---|---|---|---|
| Intra-ampullary carcinoma | ~25% of cases | arises from intra-ampullary epithelium and/or distal end of CBD or pancreatic duct | |
| Ampullary-ductal carcinoma | ~15% of cases | arises from intra-ampullary ducts | |
| Peri-ampullary duodenal carcinoma | ~5% of cases | primarily in the duodenal, ampullary orfice must be clearly within lesion | (1) intestinal type, (2) mixed mucinous-intestinal type |
| Ampullary carcinoma not otherwise specified | ~55% of cases | arise from papillary projection into duodenum - from foveolar-like epithelium with goblet cells |
Microscopic
Dependent on histologic subtype:[1][6]
- Intestinal ampullary carcinoma.
- Pancreaticobiliary ampullary carcinoma.
- Other.
Notes:
- May lack desmoplastic stroma.[3]
DDx:
- Invasive ductal carcinoma of the pancreas - has a much worse prognosis.
- Ectopic pancreas.[7]
Intestinal ampullary carcinoma
Features:[1]
- Pseudostratified columnar epithelium with hyperchromatic, ellipsoid nuclei.
- Similar to colorectal adenocarcinoma.
Pancreatobiliary ampullary carcinoma
Features:[1]
- Tubular arrangements consisting of cuboidal cells in one or two layers.
Other
Features - any of the following characteristics:[1]
- Non-tubular morphology/poorly-differentiated.
- Micropapillary architecture.
- Medullary.
- Signet ring cells.
- Mucin:
- Colloid.
- Mixed-mucinous.
- Mucinous-signet-ring.
IHC
Features:[6]
- CK7 +ve.
- CK20 +ve.
- MUC2 +ve.
Others:
- SMAD4 +ve/-ve.
- Lost in pancreatic neoplasia ~90% of cases vs. ~35% of ampullary tumours.[8]
Sign out
- Separate CAP protocol.[9]
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Adsay, V.; Ohike, N.; Tajiri, T.; Kim, GE.; Krasinskas, A.; Balci, S.; Bagci, P.; Basturk, O. et al. (Sep 2012). "Ampullary Region Carcinomas: Definition and Site Specific Classification with Delineation of Four Clinicopathologically and Prognostically Distinct Subsets in an Analysis of 249 Cases.". Am J Surg Pathol. doi:10.1097/PAS.0b013e31826399d8. PMID 23026934.
- ↑ Mills, Stacey E; Carter, Darryl; Greenson, Joel K; Reuter, Victor E; Stoler, Mark H (2009). Sternberg's Diagnostic Surgical Pathology (5th ed.). Lippincott Williams & Wilkins. pp. 1639. ISBN 978-0781779425.
- ↑ 3.0 3.1 Mills, Stacey E; Carter, Darryl; Greenson, Joel K; Reuter, Victor E; Stoler, Mark H (2009). Sternberg's Diagnostic Surgical Pathology (5th ed.). Lippincott Williams & Wilkins. pp. 1640. ISBN 978-0781779425.
- ↑ Tran, TC.; Vitale, GC. (Dec 2004). "Ampullary tumors: endoscopic versus operative management.". Surg Innov 11 (4): 255-63. PMID 15756395.
- ↑ Soravia, C.; Berk, T.; Haber, G.; Cohen, Z.; Gallinger, S.. "Management of advanced duodenal polyposis in familial adenomatous polyposis.". J Gastrointest Surg 1 (5): 474-8. PMID 9834381.
- ↑ 6.0 6.1 Fischer, HP.; Zhou, H. (2004). "Pathogenesis of carcinoma of the papilla of Vater.". J Hepatobiliary Pancreat Surg 11 (5): 301-9. doi:10.1007/s00534-004-0898-3. PMID 15549428.
- ↑ Hsu, SD.; Chan, DC.; Hsieh, HF.; Chen, TW.; Yu, JC.; Chou, SJ. (Apr 2008). "Ectopic pancreas presenting as ampulla of Vater tumor.". Am J Surg 195 (4): 498-500. doi:10.1016/j.amjsurg.2007.01.043. PMID 18304504.
- ↑ McCarthy, DM.; Hruban, RH.; Argani, P.; Howe, JR.; Conlon, KC.; Brennan, MF.; Zahurak, M.; Wilentz, RE. et al. (Mar 2003). "Role of the DPC4 tumor suppressor gene in adenocarcinoma of the ampulla of Vater: analysis of 140 cases.". Mod Pathol 16 (3): 272-8. doi:10.1097/01.MP.0000057246.03448.26. PMID 12640108.
- ↑ URL: http://www.cap.org/apps/docs/committees/cancer/cancer_protocols/2012/Ampulla_12protocol_3101.pdf. Accessed on: 12 September 2012.