Leiomyoma of the right common iliac vein presenting as a duodenal tumour.

A case of vascular leiomyoma originating from the wall of the right common iliac vein is presented. Clinical and radiological features suggested a well circumscribed tumour arising from the duodenal wall. Laparotomy revealed a tumour without connection to the duodenum, but attached to the right iliac vein. The tumour was totally resected, including partial resection of the common iliac vein. Pathology showed a smooth muscle tumour with histological features of benignity. Six months after surgery the patient is asymptomatic.