Biopsy proven pineocytoma WHO I status post repeated endoscopic stereotactic 3rd ventriculostomy for obstructivehydrocephalus: surveillance. There are postoperative findings related to right transfrontal endoscopic third ventriculostomy and biopsy of a pineal tumor. There is no significant change in size of the pineal tumor, which measures up to approximately 25 mm. There is also unchanged dilatation of the third and lateral ventricles, as well as the confluent periventricular white matter T2 hyperintensity. There is no evidence of acute infarct or hemorrhage. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits are grossly unremarkable.
No significant interval change in the size of the residual pineocytoma and triventricular hydrocephalus associated with transependymal cerebrospinal fluid flow, which may indicate third ventriculostomy failure.