Benign mixed epithelial stromal tumor of the renal pelvis with exophytic growth: case report

摘要

BackgroundMixed epithelial and stromal tumor (MEST) is a distinctive benign composite neoplasm of the kidney predominantly seen in females mostly in the perimenopausal period. Although these tumors are known to arise from renal pelvis, our case was distinct in that it had no intrapelvic component growing in exophytic fashion.