Bilateral cystic nephroblastomas and botryoid sarcoma in a child with Dandy-Walker syndrome

We report an autopsy case of an 8-month-old male infant with bilateral cystic nephroblastomas, a botryoid sarcoma involving the urinary bladder, microencephaly, the Dandy-Walker syndrome, bilateral cataracts, hypospadias, and male pseudohermaphroditism. An unusual combination of congenital malformation and tumors may reflect the presence of a mutant gene.