Pilocytic astrocytoma post ablation follow up History: pilocytic astrocytoma post ablation follow up. There are postoperative findings related to laser ablation with interval decrease in size of a tectal plate mass that now measuring approximately 16 x 20 mm in cross-section, previously 21 x 21 mm. However, there is more diffuse enhancement centrally within the mass. There is no evidence of acute intracranial hemorrhage or acute infarct. The right cerebral convexity fluid collection has resolved. There is a right transfrontal ventricular catheter that terminates adjacent to the right caudate nucleus. There are also postoperative findings related to endoscopic third ventriculostomy, with an apparent jet of cerebrospinal fluid into the third ventricle. Nevertheless, the third and lateral ventricles remain enlarged. There is no midline shift or herniation. There is a left cerebellar hemisphere developmental venous anomaly. The major cerebral flow voids are intact. The orbits, skull, paranasal sinuses, and scalp soft tissues appear unchanged.
1. Postoperative findings related to laser ablation with interval decrease in size of a tectal pilocytic astrocytoma.2. Postoperative findings related to endoscopic third ventriculostomy, with an apparent jet of cerebrospinal fluid into the third ventricle. Nevertheless, the third and lateral ventricles remain enlarged. 3. The right transfrontal ventricular catheter terminates adjacent to the right caudate nucleus.