Low grade glial neural tumor status post third ventriculostomy and biopsy: surveillance. There are postoperative findings related to right transfrontal biopsy of a periaqueductal lesion with persistent susceptibility effect and T2 hyperintensity along the surgical tract related to prior hemorrhage. There is no significant interval change in the subcentimeter nonenhancing, T2 hyperintense lesion within the tectum. There are a few scattered punctate foci of unchanged cerebral white matter T2 hyperintensity. There is no evidence of acute infarct. The ventricles and basal cisterns are unchanged in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, skull, paranasal sinuses, and scalp soft tissues are unchanged.
Postoperative findings related to biopsy of a periaqueductal lesion, which has otherwise not significantly changed in size.