Chiari malformation, worsening symptoms, headache. Brain: There are postoperative findings related to Chiari decompression. The cerebellar tonsils assume a rounded configuration and extend to the level of the tip of the dens. There is biphasic flow of cerebrospinal fluid across the neo-foramen magnum, both anteriorly and posteriorly. There is no evidence of intracranial hemorrhage, mass, or acute infarct. The brain parenchyma and pituitary gland appear unremarkable. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, skull, paranasal sinuses, and scalp soft tissues are grossly unremarkable.Cervical Spine: The spinal cord displays normal signal and morphology. 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. The paravertebral soft tissues are unremarkable.
Expected postoperative findings related to Chiari decompression without evidence of ventriculomegaly or syringohydromyelia.