Chiari malformation: headaches. The pointed cerebellar tonsils extend up to 6 mm inferior to the crowded foramen magnum. Indeed, there is impeded flow of cerebrospinal fluid across the foramen magnum and compression of the cervicomedullary junction. There is a long-segment cervicothoracic syrinx that measures up to 6 mm in width. In addition, there is a cavitary space adjacent to the syrinx in the right lower cervical cord that measures 2 mm in width. There is evidence of mass lesions. 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 are minimal posterior disc-osteophyte complexes in the cervical spine, but there is no significant spinal canal stenosis. The paravertebral soft tissues are unremarkable.
Findings related to Chiari I malformation and a long segment cervicothoracic syrinx that measures up to 6 mm in width. A cavitary space adjacent to the syrinx in the right lower cervical cord that measures 2 mm in width may represent a compartment of the syrinx or associated myelomalacia.