Chiari malformation decompression, one month post op decompression. Brain: There are postoperative findings related to Chiari decompression surgery without residual fluid collection in the subcutaneous tissues. There has been interval evolution of the left posterior medulla hematoma with a small area of encephalomalacia and resolution of the edema. The rest of the brain parenchyma is unremarkable. There is no evidence of acute infarct. The ventricles and basal cisterns are unchanged in size and configuration. There is a subcentimeter low signal lesion along the inner table of the skull overlying the left frontal lobe, which may represent an osteoma, meningioma, or calcifying pseudotumor. There is no midline shift or herniation. The major cerebral flow voids are intact. Cervical Spine: There is a trace syrinx that extends from C6 to T1. 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 are a few small posterior disc-osteophyte complexes, but no significant spinal canal or neural foraminal stenosis.
1. Postoperative findings related to Chiari decompression surgery with interval evolution of the left posterior medulla hematoma with a small area of encephalomalacia and resolution of the edema. 2. Residual trace syrinx that extends from C6 to T1. 