ABSTRACT
Renal angiomyolipoma is a rare entity, usually associated with tuberous sclerosis. Until a few years ago it was almost impossible to arrive at a correct diagnosis preoperatively, and most of the case underwent nephrectomy with the wrong diagnosis of renal carcinoma. Recently, abdominal computerized tomography and renal sonography have made it possible to reach the correct preoperative diagnosis in many cases, and thus to avoid unnecessary nephrectomies. We herein present a case of bilateral renal angiomyolipoma with tuberous sclerosis which was preoperatively diagnosed by abdominal ultrasound and CT. A 54 years old woman was admitted with pain on the left flank since 4 months ago. She has had multiple erythematous papules on the face, a small nodule like fibroma on the right third toe. Laboratory findings were normal range. Abdominal ultrasound revealed multiple, variable sized homogenous hyperechogenic mass in the both kidney. Abdominal CT scan showed multiple, variable sized low dense mass in both kidney. Biopsy specimens of the mass of the left kidney revealed fibronecrotic material and blood clots, in which was no evidence of malignancy. Biopsy specimen from the face revealed adenoma sebaceum.