Cerebral fluid overproduction in the absence of tumor or villous hypertrophy of the choroid plexus.

A case of cerebrospinal fluid overproduction in a 2.5-year-old child is reported. The rate of cerebrospinal fluid production was more than four times the expected amount. There was no evidence of tumor or villous hypertrophy of the choroid plexus. The child was successfully treated with a ventriculoatrial shunt.