並列摘要
A 60-yr-old female patient was a victim of right renal tumor disclosed in January 1996. Recently, an increased size of the tumor mass was noted during OPD ultrasonographic follow up. Computed tomography revealed a mass 1.5 x 2.0 cm occupying the right middle pole near the hilar region. Under the suspicion of renal cell carcinoma, she was treated with radical nephrectomy. The histology of the tumor showed a picture of leiomyoma arising from the renal capsule. We present this case and review the literature.