Endoscopic management of a choroid plexus cyst of the third ventricle: case report and documentation of dynamic behavior.

Purpose: The aim of this study is to document the dynamic behavior of a choroid plexus cyst of the third ventricle. Although these lesions may float freely within the ventricle leading to intermittent obstruction of the cerebrospinal fluid (CSF) circulation at variable points in a single patient, such a phenomenon has only been documented using cranial ultrasonography and was never observed intraoperatively.

Methods: We endoscopically treated a case of third ventricular choroid plexus cyst in a 9-year-old boy who presented with headaches and disturbed conscious level.