Document Type : Case Report


Surgery Department, Qom University of Medical Sciences, Qom, Iran



A 76-year-old woman presented with a one-year history of intermittent right lower abdominal pain, little weight loss, and palpable mass in the right lower quadrant of the abdomen. Pelvic ultrasound scan identified a lobulated hypo-hetero-echoic mass with some calcified foci. Computed tomography scan revealed a low-attenuated lesion-like mass in the perineal region, which suggested a cystic localized tumor. Colonoscopy showed sub-mucosal lesion in the cecum. The patient underwent Laparotomy, and a right hemicolectomy (include ileum) with ileocolic anastomosis was performed. She was treated successfully. In the Histological examination, two mass-like lesions were found to attach to the appendix. In the proximal portion of the appendix, there were cystic structures that showed a low-grade appendiceal mucinous neoplasm. The tip of the appendix showed a well-differentiated neuroendocrine tumor (carcinoid tumor). In this unusual case, even though the initial origins of these two tumors are quite different, two tumors appeared in a single histological section.


This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination, and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.30476/mejc.2021.89175.1510