Subarachnoid glioependymal cyst: a case report.

A case of subarachnoid glioependymal cyst in a newborn baby is reported. An intracranial cystic lesion was found at 32 weeks of gestation by ultrasonography. The infant was born with an enlarged head and impaired auditory evoked potential (AEP). Computed tomography and magnetic resonance imaging revealed a large homogeneous cystic lesion over the left cerebral convexity with displacement of the left hemisphere to the right. Craniotomy was performed, with removal of the cystic wall and insertion of a cystoperitoneal shunt. Postoperatively, improvement was noted on clinical examination and ultrasonography. Previously, only one such case, treated perinatally, has been reported.