Primary leiomyosarcoma of the middle ureter: A rare case report with literature review.

Leiomyosarcoma is a rarely seen neoplasm of the ureter. Malignant tumors of smooth muscle of the ureter are extremely rare, and about 22 cases of leiomyosarcoma of ureter have been reported to date. A 57-year-old diabetic Pakistani man presented with a dull ache pain in the right flank.