Leiomyoma of the kidney--report of two cases.

Renal leimyoma is an uncommon benign tumour, which pose a challenging diagnostic and therapeutic problem. When multiple (leiomyomatosis) they are preoperatively mistaken for malignant tumors. We herein-present one case of renal leiomyomatois developing in a 50 year old male, which was clinically diagnosed as renal cell carcinoma and one case of renal leiomyoma in a 37 year old male.