Posterior fossa cysts due to congenital atresia of the foramina of Luschka and Magendie.
D001927:Brain Diseases; D002552:Cerebral Ventricles / Q000002:abnormalities*; D000013:Congenital Abnormalities; D003560:Cysts; D006801:Humans; D006849:Hydrocephalus / Q000209:etiology*
ABNORMALITIES; CEREBRAL VENTRICLES/abnormalities; HYDROCEPHALUS/etiology and pathogenesis