Primary neuroendocrine tumors of the cystic duct

Primary neuroendocrine tumors of the cystic duct are extremely rare. Only 4 cases have been described to date. We report 2 patients in whom a primary neuroendocrine tumor of the cystic duct was incidentally detected during hi stological examination following cholecystectomy. With regard to the primar y neuroendocrine tumor both patients were asymptomatic at the time of diagn osis. However, histologic examination did not confirm that the neuroendocri ne tumors had been completely removed. Both patients underwent a second pro cedure. They are well after 47 and 49 months, respectively.