Abstract
Objective: This article aims to report a case in which there was an accidental diagnosis of neuroendocrine tumor of the appendix during tomographic investigation of renal calculus. Case Report: Woman, 62 years old, with accidental diagnosis, on computed tomography, of tumor in the cecal appendix undergoing videolaparoscopic appendectomy with anatomopathological diagnosis (AP) and immunohistochemistry of a 2.5 x 1.5 cm neuroendocrine tumor, infiltrating fat adjacent, with perineural infiltration, positive for chromogranin and proliferative index by Ki67 <2%. Due to the finding of the AP, she underwent a right hemicolectomy. The patient in question remained in follow-up for 2 years, with serial computerized tomography performed annually; in her last check-up at the clinic, she was instructed and released from follow-up, with a cure. Final Considerations: Neuroendocrine tumors of the appendix are rare neoplasms, usually with a good prognosis. Its diagnosis and treatment must be based on the histopathological and immunohistochemical report. In selected cases, right hemicolectomy is indicated.