# Mesenteric and Retroperitoneal Mucinous Cystic Neoplasms: A Nongynecologic Process Commonly Managed by Gynecologic Oncologists

## TL;DR

This paper discusses rare non-gynecologic tumors often treated by gynecologic oncologists, highlighting a possible link to diverticulosis.

## Contribution

The study presents a potential correlation between diverticular disease and mesenteric-retroperitoneal mucinous cystic neoplasms.

## Key findings

- Two patients with pelvic masses were diagnosed with mesenteric-retroperitoneal mucinous cystic neoplasms.
- Both patients had diverticulosis and developed diverticulitis during their perioperative course.
- A possible association between diverticular disease and these tumors is suggested.

## Abstract

Retroperitoneal mucinous cystic neoplasm is a rare pathology. Data regarding diagnosis and treatment are limited and based on case reports and series. We describe a case series of two patients each presenting with a pelvic mass suspicious for an adnexal neoplasm. Both were treated surgically with complete resection of the suspected tumor. Pathology from both specimens revealed mesenteric–retroperitoneal mucinous cystic neoplasm. Uniquely, both patients had diverticulosis and their perioperative course was complicated by diverticulitis. We investigate a possible correlation between diverticular disease and the histopathology of mesenteric retroperitoneal mucinous cystic neoplasms.