Incidental Pelvic-mass Venous Aneurysm in a 58-year-old Man

A Li, YYR Chan, CY Lui, S Lau, KL Mak, HS Lam

Hong Kong J Radiol 2005;8:63-6

This article describes a case of venous aneurysm that was incidentally found in the pelvic cavity of a 58-year-old man who presented with dull epigastric pain. A midline pelvic, unilocular cystic mass with wall calcification was found during ultrasonography and computed tomography. During excision surgery, the mass was found to be lying within the mesosigmoid and pushing the sigmoid colon and rectum towards the right side. It was attached posteriorly to the anterior wall of the sacrum and it extended inferiorly almost to the trigone of the urinary bladder. There were multiple feeding vessels from the left internal iliac vessels. Subsequent pathological examination confirmed the mass to be a venous aneurysm.