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Gastroenteropancreatic neuroendocrine tumors: Incidence and treatment outcome in a single institution in Korea
Author(s) -
LIM Taekyu,
LEE Jeeyun,
KIM Jae J,
LEE Jong Kyun,
LEE Kyu Taek,
KIM Young Ho,
KIM KwangWon,
KIM Sung,
SOHN Tae Sung,
CHOI Dong Wook,
CHOI Seong Ho,
CHUN HoKyung,
LEE Woo Young,
KIM KyoungMee,
JANG KeeTaek,
PARK Young Suk
Publication year - 2011
Publication title -
asia‐pacific journal of clinical oncology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 29
eISSN - 1743-7563
pISSN - 1743-7555
DOI - 10.1111/j.1743-7563.2011.01423.x
Subject(s) - medicine , gastroenterology , rectum , neuroendocrine tumors , pancreas , incidence (geometry) , retrospective cohort study , carcinoma , cohort , oncology , physics , optics
Aim: We studied to identify the clinicopathological features, treatment outcome, and prognostic factors for patients with gastrointestinal and hepatopancreaticobiliary neuroendocrine tumor (NET). Method: Between February 2001 and May 2006, a total of 470 patients were diagnosed with NET arising from the gastrointestinal tract, pancreas, and hepatobiliary system. The retrospective patient cohort was obtained and analyzed. Results: The male to female ratio was 1.5:1, and the median age was 55 years (range, 16–81). The most common primary site was the rectum (55.8%). Overall 29 (6.2%) originated from the hepatobiliary system. At initial presentation, 60 patients (12.8%) showed distant metastases. Curative surgery or endoscopic resection was performed in 401 patients. Histopathological distributions were as follows: well differentiated tumor (82.1%), well differentiated carcinoma (10.2%) and poorly differentiated carcinoma (7.7%). The frequency of the poorly differentiated type was somewhat higher in the hepatobiliary system than in the pancreas and gastrointestinal tract (44.8, 15.4 and 2.8%, respectively, P < 0.05). The estimated 5‐year overall survival rate for all patients was 89.6%. Multivariate analysis showed that distant metastases ( P = 0.018), origin from the hepatobiliary system ( P < 0.001) and poorly differentiated neuroendocrine carcinoma ( P < 0.001) were independent predictors for poor survival outcome. Conclusion: Patients with locoregional NET had a favorable long‐term survival after curative resection. Distant metastases, hepatobiliary localization and a poor degree of tumor cell differentiation were poor prognostic factors. Further investigational approaches for treatment of advanced disease are needed.