Leptomeningeal cyst formation. Report of an unusual case.

A 34-year-old female was admitted to hospital with complaints of headache, left-sided scalp mass, right-sided hemiparesis and seizures and the history of a head injury when she was five years old. X-rays revealed a left temporoparietal lens-shaped defect. CT scans showed a cystic cavity which was connected with the ventricular system. On operation the loss of dura mater was found to be greater in extent than the loss of brain tissue. Recovery after surgical intervention is seen after two weeks.