Chiari malformation, status post decompression, occipital neuralgia, hemangioblastoma, benign tumor of the pituitary: yearly followup. There are stable postoperative findings related to Chiari decompression and fourth ventricular stenting. The cerebellum displays an unchanged morphology and signal characteristics. There is cerebrospinal fluid flow across the foramen magnum and through the fourth ventricular stent. There is an unchanged 5 mm diameter T1 hyperintense nodule along the superior aspect of the pituitary gland. There are unchanged minimal nonspecific scattered punctate foci of T2 hyperintensity in the cerebral white matter. There is no evidence of intracranial hemorrhage or 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 and paranasal sinuses are grossly unremarkable. There is no evidence of pseudomeningocele.
1. Stable postoperative findings related to Chiari decompression and fourth ventricular stenting with flow of cerebrospinal fluid across the foramen magnum and into the fourth ventricular stent.2. An unchanged 5 mm diameter T1 hyperintense nodule along the superior aspect of the pituitary gland likely represents a Rathke cleft cyst. 