 Brain: There are postoperative findings related to Chiari decompression. There has been interval resolution of the fluid collection overlying the duraplasty. There is persistent mild deformity of the left inferior cerebellum, which contacts the duraplasty material. There is CSF flow across the anterior and posterior portions of the foramen magnum, but persistent focal narrowing of the column of CSF flow through the posterior spinal canal at C2. There is an unchanged T1 hyperintense lesion in the pituitary gland that measures up to 7 mm. The ventricles are unchanged in size and configuration. There is no evidence of acute infarction. Spine: There has also been interval decrease in the caliber of the diffuse cervicothoracic syringohydromyelia, now measuring up to 4 mm in width, previously 7 mm. The vertebral column alignment is within normal limits. The vertebral body and disc space heights are preserved. The vertebral bone marrow signal is unremarkable. There is no significant spinal canal stenosis.
1. Postoperative findings related to Chiari decompression with interval resolution of the fluid collection overlying the duraplasty and interval decrease in the caliber of the diffuse cervicothoracic syringohydromyelia. 2. Persistent mild deformity of the left inferior cerebellum, which contacts the duraplasty material, is suggestive of adhesion formation.3. A subcentimeter lesion in the pituitary gland likely represents a Rathke cleft cyst. 