Adult renal sarcoma: A rare case of recurrence 13 years after initial resection.

Renal sarcoma is a rare and aggressive malignancy without proper guidelines for treatment. Due to the aggressiveness of this disease and the potential for recurrence, we believe that extensive surgical resection with healthy margins may be the best option to treat this condition during both initial resection and resection of the recurrent lesion. Clinical follow-up is also important to monitor for tumor recurrence.