Abstract
Fibroepithelial polyps (FEP) are rare benign tumors urinary collecting system. Diagnosis is suspected on Computed Tomography (CT) and confirmed via histopathology. Treatment options vary from historic nephroureterectomy to more contemporary methods of ablation. Authors present a case of a symptomatic FEP causing left-sided hydronephrosis and episodic flank pain treated by a urologic surgeon. The patient underwent robotic pyeloplasty and excision of the tumors, yielding preserved renal function and resolution of the hydronephrosis.