Primary renal leiomyosarcoma.

Smooth muscle cells in the renal parenchyma or renal pelvis give rise to the incredibly uncommon and aggressive kidney cancer known as leiomyosarcoma. Because it is uncommon and has nonspecific clinical features, it can be challenging to diagnose, making up less than 1% of all kidney tumours. Adults frequently exhibit it, with a slight preference for females in some instances that have been reported. A male in his early 60s with a history of abdominal pain for the previous 2 months is presented here with a case of leiomyosarcoma of the kidney. While adjuvant medications like chemotherapy and radiation therapy have little effect, surgical resection with clear margins remains the main treatment option. There is a considerable chance of recurrence, so long-term monitoring is necessary.