A Case of Appendiceal Endometriosis Masquerading as Appendiceal Neuroendocrine Neoplasm

Abstract

A 47-year-old female patient with a history of chronic abdominal pain was admitted to our hospital. Abdominal ultrasonography and plain abdominal CT revealed an appendiceal mass. Contrast-enhanced abdominal CT showed a 2-cm enhancing nodule in the appendiceal body. Based on the findings, neuroendocrine neoplasm was suspected, and laparoscopic ileocecal resection was performed. Histopathological examination of the resected specimen revealed appendiceal endometriosis. This case serves to underscore the importance of keeping in mind the possibility of endometriosis in the differential diagnosis in premenopausal women presenting with an appendiceal mass.