Possible Chiari malformation, headaches, and back pain. The cerebellar tonsils are minimally low-lying, extending up to 3 mm inferior to the foramen of magnum. The cerebellar tonsils display a normal morphology and there is intact CSF flow across the foramen magnum. The spinal cord displays normal signal and morphology, without evidence of syrinx. 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.
Minimally low-lying cerebellar tonsils with intact CSF flow across the foramen magnum and no evidence of cervical spinal cord syrinx.