Chiari malformation: headaches. The cerebellar tonsils are mildly pointed and extend up to 5 mm inferior to the foramen magnum. In addition, there is crowding of the tissues at the foramen magnum with diminished flow of cerebrospinal fluid posteriorly, but the flow of cerebrospinal fluid is preserved anteriorly. 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 spinal cord displays normal signal and morphology. The conus medullaris is positioned at the L1-2 level. There is no evidence of fibrofatty filum. The paravertebral soft tissues are unremarkable.
1. The cerebellar tonsils extend up to 5 mm inferior to the foramen magnum with other feature of Chiari 1 malformation.2. No evidence of syringohydromyelia.