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Goblet cell carcinoids at extraappendiceal locations of gastrointestinal tract: An underrecognized diagnostic pitfall.
MedLine Citation:
PMID:  21240989     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: Goblet cell carcinoid (GCC) is a clinicopathologically distinctive tumor that typically arises in appendix and metastasizes frequently. Although rare cases of ostensibly primary extraappendiceal GCC (EGCC) have been reported, the distinction from extraappendiceal metastasis of occult appendiceal primary may be problematic and has not been dealt with systematically in literature. METHODS: We reviewed our combined experience with EGCC at four North American hospitals and reevaluated all EGCC cases published in literature. RESULTS: We encountered 16 cases that were initially reported as EGCC. Five cases presented with disseminated abdominopelvic spread, nine cases with mass lesions in stomach, ileum, cecum, ascending colon, hepatic flexure, sigmoid, and rectum. One case was found incidentally in an ascending colon adenomatous polyp. A negative appendix was confirmed in 2 (12.5%) cases, whereas a primary appendiceal GCC was discovered in 4 (25%) cases at a later date, and appendix was not available for review in 10 cases (62.5%). Of 10 cases of EGCC found in literature, the tumor sites included stomach, duodenum, jejunum, ileum, cecum, spelenic flexure, and rectum. Primary appendiceal tumor was excluded histologically in one (10%), grossly in three (30%), and not at all in six (60%). Nine of our cases were initially misdiagnosed as signet-ring cell adenocarcinomas. CONCLUSIONS: True EGCC is extremely rare. GCC found at locations other than appendix are most likely extraappendiceal presentations of appendiceal primary. A thorough review of the pathologic status of appendix should be a mandatory diagnostic criterion and should always be documented in the pathology reports. J. Surg. Oncol. 2011;9999:1-6, © 2011 Wiley-Liss, Inc.
Authors:
Xianyong Gui; Lihui Qin; Zu-Hua Gao; Vincent Falck; Noam Harpaz
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-1-15
Journal Detail:
Title:  Journal of surgical oncology     Volume:  -     ISSN:  1096-9098     ISO Abbreviation:  -     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-1-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0222643     Medline TA:  J Surg Oncol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Calgary Laboratory Services, Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, AB, Canada.
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