History of tethered cord release with history of syringomyelia. Evaluate syrinx. There is dilatation of the central spinal canal that extends from the level of T4-T5 to the conus medullaris, which terminates at the level of L1-L2. The central canal with the cord is again dilated, and measures up to 10 x 9 mm at the level of T7-T8, previously 10 x 9 mm, and 5 x 5 mm at the level of T12, previously 5 x 5 mm. There is no significant change in the extent or size of the syrinx. There is appropriate ventral motion of the cord with prone positioning. There is no evidence of filar T1 hyperintensity or filar thickening. The vertebral column alignment is within normal limits. The vertebral body and disk space heights are preserved. There is no worrisome bone marrow signal. There is no significant spinal canal stenosis, disc herniation, or neural foraminal narrowing.
1. Stable size of the thoracolumbar syrinx. 2. No MR evidence of cord tethering. 