Hyperdiploidy in a case of favorable histology Wilms tumor

Hyperdiploidy is useful in defining histologic variants of Wilms tumor and prognosis in other childhood cancers. We describe a case of hyperdiploid favorable histology Wilms tumor (50,XY,+6,+7,+8,+10,+12,-21[2]/51,idem,+9[6]/46,XY[12]) in a 3-year-old boy, and review the literature for other hyperdiploid childhood renal lesions.