Neuroendocrine gastroenteropancreatic tumors constitute a heterogeneous group of neoplasms, with the primary tumors being located in the gastric mucosa, pancreas, and small and large intestine. The development of a second primary malignancy in patients with these tumors is a well-described phenomenon, and the reported incidence ranges from 12% to 46%. The most common site of associated noncarcinoid malignancies is the gastrointestinal tract, which involves from 30% to 60% of the tumors. We report a case of concurrent colon carcinoma and two neuroendocrine tumors of the duodenum.
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3.
LiA.F., HsuC., LiA., TaiL., LiangW., LiW., TsayS., ChenJ.: A 35-year retrospective study of carcinoid tumors in Taiwan. Differences in distribution with a high probability of associated second primary malignancies.Cancer, 112: 274–283, 2008.
4.
LevyA.D., TaylorL.D., AbbottR.M., SobinL.: Duodenal carcinoids: imaging features with clinical-pathologic comparison.Radiology, 237: 967–972, 2005.
