[Two cases of renal angiomyolipoma]

Two cases of renal angiomyolipoma without tuberous sclerosis are presented. The 1st case was a 33-year-old woman who had left flank pain and macroscopic hematuria on August 26, 1980. Physical examinations revealed a large left renal tumor, and selective renal angiograms showed the presence of a hypovascular mass located in the central to median lower part of the left kidney. Ultrasonography showed a high echogenic mass accompanied by a round low echogenic area in the left kidney. Computed tomography revealed a fatty density in the renal mass. The 2nd case was a 60-year-old woman who was incidentally diagnosed as having a right renal tumor by ultrasonography on February 18, 1982. The echogram showed a high echogenic mass in the right kidney, and the fatty density in the renal mass was determined by computed tomography. These patients underwent nephrectomy and the histological diagnosis was angiomyolipoma. The usefulness of ultrasonography and computed tomography in the preoperative diagnosis of this clinical entity and the possibility of association with renal cell carcinoma are discussed.