Tethered cord protocol prone and supine. There appears to be prominence or anterior translation of the posterior C1 arch, which bulges into the spinal canal. The vertebral column alignment is otherwise within normal limits. There is lumbarization of S1. The vertebral body and disc space heights are preserved. The vertebral bone marrow signal is unremarkable. The spinal cord displays normal signal and morphology. The conus medullaris is located at the L2-3 level and shifts in position between prone and supine imaging. There is no evidence of fibrofatty filum terminale. The paravertebral soft tissues are unremarkable. However, there is a colostomy.
1. Apparent prominence or anterior translation of the posterior C1 arch, which bulges into the spinal canal, which may be developmental or positional.2. No evidence of syringohydromyelia.3. The conus medullaris is located at the L2-3 level and shifts in position between prone and supine imaging. 4. No evidence of fibrofatty filum terminale. 