 Evaluation somewhat limited due to differences in slice thickness especially without of the prior exam. There is redemonstration of postoperative changes from prior posterior fossa mass resection. There is persistent minimal linear nodular enhancement along the left anterolateral aspect of the fourth ventricle, which remains decreased in overall extent from the May 2014 exam. It currently measures 4 x 5 mm in greatest axial dimensions, compared to previous 4 x 2 mm on 11/6/2014, although this could in part relate to due to differences in technique. There are no new remote foci of pathological enhancement. There remain areas of T2/FLAIR hyperintensity along the resection cavity margins in the cerebellum. There is no diffusion restriction, midline shift, mass effect, or extra-axial collection.
Persistent minimal nodular enhancement along the left lateral fourth ventricular margin, with apparent and slight increased conspicuity which may be due to differences in technique. Findings are overall decreased in extent compared to May 2014. Continued close follow-up is recommended.