Introduction
“Botryoid”, first described in 19811, is a descriptive term used for tumors with a lobular grape-like appearance growing in a polypoid fashion into the renal pelvis and was found in gross and histological examinations in 10% of patients with Wilms tumor2. Botryoid growth pattern (BGP) in bilateral Wilms tumor (BWT) is extremely rare, and the surgical management is challenging because of the absolute need to preserve renal parenchyma and to avoid a tumoral spillage.