“…In general, treatment of bilateral Wilms' tu-mor must be highly individualized and, based on recent reviews, may be summarized as follows [6, 18, .47]: in all caes of Wilms' tumor, both kidneys should be thoroughly palpated or inspected. Originally, surgical attitudes favored gross total removal of tumor by nephrectomy, nephrectomy plus contralateral partial nephrectomy, or bilateral partial nephrectomy while sparing enough tissue ( 15%-35%) [41 ] to ensure adequate renal function. More recent publications [26] suggest that a more conservative surgical approach may be appropriate, stressing biopsy at initial exploration with subsequent second-and third-look operations and preservation of at least 60% of renal tissue.…”