 The cerebellar tonsils are low lying, extending up to approximately 8 mm inferior to 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 or herniation. The major cerebral flow voids are intact. The orbits, skull, paranasal sinuses, and scalp soft tissues are grossly unremarkable. There is possible linear signal abnormality along the imaged portions of the upper cervical spinal cord.
1. No evidence of acute or chronic infarct.2. Low-lying cerebellar tonsils compatible with Chiari 1 malformation. 3. Possible linear signal abnormality along the imaged portions of the upper cervical spinal cord may represent artifact versus less likely syrinx, given that the prior spine MRI from 2010 did not show this abnormality. Nevertheless, a repeat MRI may be useful if the development of a syrinx is a clinical consideration.I personally reviewed the Images and/or procedure with the Resident/Fellow and agree with this report.