A CASE OF RENAL CAPSULAR LEIOMYOBLASTOMA

A case of renal capsular leiomyoblastoma is presented. A 36 year-old female was admitted to our hospital because of a left flank mass on Jan. 21, 1980. A left retrograde pyelogram showed upper medial displacement of the left renal pelvis and calyx, and median dislocation of the left ureter. An abdominal CT-scan showed a large mass with soft tissue density. Selective renal arteriography showed the lower border of the left kidney to be compressed by a vascular tumor that was supplied by the superior capsular artery and the perforating middle capsular artery. Transperitoneal radical nephrectomy was performed on Jan. 25, 1980. The tumor weighed 1030 gm. Hisotlogical diagnosis was renal leiomyoblastoma originating from renal capsule. The patient was well without recurrence 24 months after operation. Our present case is the 2nd case of renal capsular leiomyoblastoma reported in the English and Japanese literature.