Case of an Low Grade Appendical Mucinous Neoplasia (LAMNS) Presenting as a Right Ovarian Mass

Abstract

Appendiceal carcinoma has an incidence of 0.12 cases per 1,000,000 people per year [1]. Of all intestinal tumors, malignant tumors of appendix are less than 0.5%. They are classified into three groups: carcinoid tumors, mucinous cystadenocarcinomas and adenocarcinomas, based on architectural and cytologic features [2]. Appendiceal carcinoma present with acute right abdominal pain, and can also present as a palpable abdominal mass, acute intestinal obstruction or ascites. Most of them are diagnosed unexpectedly from histopathologycal analysis after a simple appendectomy. That is why it is important for gynecologists and general surgeons to consider appendiceal mucinous cystadenomas in their differential diagnosis for a pelvic mass, because early recognition can prevent iatrogenic rupture and subsequent spilling of potentially malignant mucin-producing cells in a peritoneal cavity. In our case report, we present a low grade mucinous appendiceal tumor, diagnosed during surgery in an operating room.