Chiari malformation decompression 3 month follow up with syrinx. Brain: There are postoperative findings related to Chiari decompression, with interval resolution of the extradural fluid collection in the surgical bed. There is deformity of the inferior cerebellum, with what appears to be adhesion formation. In addition, there is associated interval formation of a cystic space overlying the inferior medial left cerebellar hemisphere that measures up to 9 mm in thickness. There appears to be impeded flow of cerebrospinal fluid across the neo-foramen magnum. There is no evidence of acute infarct. The supratentorial brain parenchyma appears to be unremarkable. The ventricles and basal cisterns are unchanged in size and configuration. There is no midline shift. The major cerebral flow voids are intact. The orbits are grossly unremarkable. There is mild mucosal thickening in the left maxillary sinus.Cervical Spine: There is a persistent focal syrinx at the level of C2 that measures up to 2 mm in width. There is also a small amount of encephalomalacia in the anterior cervicomedullary junction. The vertebral column alignment is within normal limits. The vertebral body and disc space heights are preserved. The vertebral bone marrow signal is unchanged, with what may represent a hemangioma in the C6 vertebra. There is no significant spinal canal stenosis.
1. Postoperative findings related to Chiari decompression, with interval resolution of the extradural fluid collection in the surgical bed, but evidence of adhesion formation in the posterior fossa associated interval formation of a cystic space overlying the inferior medial left cerebellar hemisphere and apparent impeded flow of cerebrospinal fluid across the neo-foramen magnum. 2. Persistent focal syrinx at the level of C2 that measures up to 2 mm in width. 3. Small amount of encephalomalacia in the anterior cervicomedullary junction. 