Chiari malformation, yearly follow up: neck pain, gait changes. Brain: The cerebellar tonsils extend up to 5 mm inferior to the foramen magnum and displays mildly pointed morphologies, which is unchanged. There is intact CSF flow across the anterior foramen magnum, but minimally impeded CSF flow across the posterior foramen magnum. There is no evidence of intracranial hemorrhage, mass, or acute infarct. The brain parenchyma and pituitary gland appear unremarkable. There is no abnormal intracranial enhancement. 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, skull, paranasal sinuses, and scalp soft tissues are grossly unremarkable.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.
1. The cerebellar tonsils extend up to 5 mm inferior to the foramen magnum and displays mildly pointed morphologies, which is unchanged. 2. No evidence of syringohydromyelia.