Pararenal Retroperitoneal Angiomyolipoma: A Rare Case Report

Angiomyolipomas are benign mesenchymal tumors that usually occur in kidneys. In contrast, pararenal angiomyolipomas are very uncommon tumors. We report a rare case of pararenal retroperitoneal angiomyolipoma with no evidence of tuberous sclerosis. A 33 years old woman presented with left sided flank pain. Abdominal computerized tomography (CT) revealed a large angiomyolipoma of 9.3x6.1x7.7centimeters sized arising from the lower pole of left kidney. During surgical procedure mass was found to be at pararenal retroperitoneal location. Histopathological examination and immunohistochemistry revealed the mass to be pararenal angiomyolipoma.