Choroid plexus papilloma producing symptoms by secretion of cerebrospinal fluid.

A choroid plexus papilloma of the lateral ventricle presenting in early infancy and producing symptoms purely by secretion of cerebrospinal fluid with formation of a large cyst is presented. Initial conservative management by cyst-peritoneal shunt was followed by late recurrence of symptoms due to reformation of the cyst when the shunt blocked. Excision of the tumour afforded definitive relief.