Headaches. Brain: There cerebellar tonsils extend up to 9 mm inferior to the foramen magnum and display pointed morphologies. The posterior fossa also appears to be slightly small. Nevertheless, there is flow of cerebrospinal fluid across the foramen magnum. 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. The major cerebral flow voids are intact. The orbits, 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.
Findings compatible with Chiari malformation, but no syringohydromyelia.