19 years, Female, Chiari malformation status post decompression surgery in 2012. Headache, neck pain and dizziness. There are postsurgical changes of remote suboccipital craniectomy and posterior arch of C1 resection for Chiari malformation. There is preservation of the CSF spaces and preservation of biphasic flow ventrally and dorsally at the foramen magnum. Susceptibility artifact is seen related to the prior surgery. Remainder of the brain parenchyma is unremarkable. The ventricles are within normal limits in size and configuration. No restricted diffusion to suggest acute ischemia. No intracranial hemorrhage. No intracranial mass or mass-effect. No abnormal parenchymal or meningeal enhancement. Major flow-voids are preserved.Sella and orbits are grossly within normal limits. Paranasal sinuses and mastoid cells are grossly clear. Bone marrow signal and extracranial soft tissues are within normal limits.
Postoperative changes related to Chiari decompression with preservation of the CSF spaces and CSF flow ventrally and dorsally at the foramen magnum. Remainder of the brain parenchyma appears unremarkable.