Lateral ventricle plexus papilloma and communicating hydrocephalus.

A choroid plexus papilloma was found in the right lateral ventricle of a five-month-old boy. Though it was associated with an important communicating hydrocephalus, it was seen at operation to be freely mobile and did not directly obstruct the flow of the cerebrospinal fluid. Computerized axial tomography was the most helpful para-clinical investigation for diagnostic purposes, and for follow-up study. Tumor removal alone was sufficient to cure the hydrocephalus, and no shunt was necessary. We feel that this case demonstrates that hyperproduction of CSF is sufficient alone to cause communicating hydrocephalus in patients with choroid plexus papilloma of the lateral ventricle.