Intraventricular rhabdomyosarcoma after resection of hyperplastic choroid plexus

Primary intracranial rhabdomyosarcoma is extremely rare. Here, a case that is most consistent with a botryoid rhabdomyosarcoma is described in a 4.5-year-old boy. The case is unique because it was preceded by a congenital Dandy-Walker malformation, choroid plexus hyperplasia and an enormous oversecretion of cerebrospinal fluid during infancy.