Extrarenal retroperitoneal angiomyolipoma: case report and review of the literature.

Angiomyolipomas are rare benign tumors that usually occur in the kidneys. Extrarenal angiomyolipomas are extremely uncommon. We describe a case of angiomyolipoma arising in the retroperitoneum that was successfully treated by arterial embolization and surgical excision. The literature on retroperitoneal extrarenal angiomyolipoma and its differential diagnoses is briefly reviewed.