Surgical management of a primary retroperitoneal venous aneurysm originating from the presacral venous plexus.

Venous aneurysms are rare vascular abnormalities, and primary venous aneurysm originating from sacral venous plexus is exceedingly rare. In this article, we report a 28-year-old man with a large venous aneurysm (∼15 × 10 cm in size) originating from presacral venous plexus. The patient complained of 1 year of constant back pain associated with frequent defecation and urination, caused by the compression from the aneurysm. Exploratory laparotomy was performed for diagnosis, with successful aneurysmectomy to relieve the compression. The patient recovered uneventfully with complete relief of symptoms. Postoperative histopathologic examination manifested classic venous aneurysm. During follow-up 6 months after surgery, all symptoms were resolved without significant postoperative complications.