Female 16 years old Reason: Chiari malformation and syrinx, yearly eval for changes, Cervical spine: Redemonstrated are findings of Chiari I with peg-like cerebellar tonsils measuring up to 17 mm below the foramen magnum and unchanged. There remains severe crowding at the foramen magnum with effacement of the anterior and posterior CSF spaces and severely diminished biphasic flow. There is unchanged retroflexed configuration of the odontoid which contributes to the foramen magnum narrowing.Overall, no significant change in syringomyelia which extends from C3 to T11. It measures 2 x 7 mm at the C6 level in the AP and transverse dimensions in the axial plane. There appears to be tiny decrease at certain levels, for example measuring 1.9 mm in the sagittal plane at C7, previously 2.6 mm .The vertebral body heights and intervertebral disk spaces are maintained. The alignment is anatomic. No bone marrow signal abnormalities. No significant disc disease, spinal canal or neural foraminal stenosis. No significant change in CSF signal structure in the posterolateral right spinal canal at the C1 level measuring 8 x 4 mm which may represent a pocket of CSF/arachnoid cyst. Thoracic spine: Syringomyelia extending to T11 as described above with areas appearing stable to minimally smaller in the interval. The vertebral body heights are maintained. Thoracic dextroscoliosis and thoracolumbar levoscoliosis again noted and better assessed on standing radiographs. No bone marrow signal abnormalities. Mild degenerative changes including disc osteophyte complex at T11-12. No significant spinal canal or neural foramen stenosis.Lumbar Spine: The vertebral body and intervertebral disk heights are maintained. The alignment is anatomic. No bone marrow signal abnormalities. The conus medullaris terminates at the L1 level and the filum terminale is within normal limits. No significant spinal canal or neural foramen narrowing.
Compared to 8/7/2014, no significant change in findings of Chiari I with cervico-thoracic syrinx extending from C3 to T11. Upper thoracic dextroscoliosis and thoracolumbar junction levoscoliosis better assessed on standing radiographs. 