[Acquired internal hydrocephalus complicating mumps meningo-encephalitis (author's transl)]

A 6 1/2 years old girl is reported who developed internal hydrocephalus due to an occlusion of the rostral aquaeduct, 2 1/2 months after epidemic parotitis. Epileptic reactions of focal origin occurred during the clinical cause, the implications of this special event and pathogenetic aspects of mumps-meningo-encephalitis are discussed, recent advances in experimental animals are included.