[Hypersecretive congenital hydrocephalus due to choroid plexus villous hypertrophy associated with controlateral papilloma].

The authors present a case of a nine month-old baby with hypersecretive congenital hydrocephalus. The CSF overproduction was the result of a rare abnormality of the choroid plexus, a villous hypertrophy of the right ventricular choroid plexus and a left ventricular plexus papilloma. Surgical removal of the plexus papilloma and the plexectomy of the hypertrophic ventricular structure did not ameliorate the hydrocephalus, which has been controlled after a biventricular-peritoneal shunt. The physiopathological relationship between hydrocephalus and choroid plexus abnormalities are reported. The importance of an early diagnosis and treatment is stressed. Both hydrocephalus and choroid plexus pathology may represent a cause of psychomotor delay, for the little patient the effects of which is investigated in this paper.