# Lateral Pelvic Wall Schwannoma: A Case Report and Literature Review

## TL;DR

A 65-year-old man was found to have a rare schwannoma in his pelvic wall, initially mistaken for cancer, and later confirmed through surgery and histopathology.

## Contribution

This case highlights the rare occurrence of a schwannoma in the lateral pelvic wall and its misdiagnosis as metastatic cancer.

## Key findings

- The lesion was identified as a schwannoma, not metastatic cancer, through histopathology.
- The schwannoma originated from the obturator nerve, as determined from laparoscopic footage.
- The case emphasizes the importance of accurate diagnosis in rare pelvic tumors.

## Abstract

Schwannomas are a type of benign nerve sheath tumor originating from Schwann cells that very rarely originate from nerves within the pelvis. Here, we report a case of a 65-year-old male with a background of rectal adenocarcinoma who had a lesion identified within his right lateral pelvic wall on an MRI scan, initially believed to be metastatic spread to a lymph node. He underwent a laparoscopic abdominoperineal resection as well as a lateral pelvic side wall dissection. Histopathology identified the lesion as a schwannoma, which, upon review of the recorded laparoscopic footage, was identified as originating from the obturator nerve.