History of tethered cord release with syringomyelia Again seen is dilatation of the central spinal canal that extends from approximately T4-T5 level to the conus medullaris, which terminates at the level of L1-L2. There are 2 components with maximal dilatation noted at the T7 level measuring proximally 10 x 11 mm similar to prior and a more inferior component with maximal dilatation at the T12 level measuring 5 x 4 mm. Allowing for differences in measurement technique, there is no significant change. There is also no significant change in the craniocaudal extent. Enlargement of the cord caliber at these levels is also unchanged.There is appropriate ventral motion of the cord with prone positioning. There is no evidence of filar lipoma or other masses along the filum terminale and cauda equina nerve roots.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. There is evidence of prior surgery in the lumbar spine for release of presumed tethered cord.
1. No significant change in size and extent of the thoracolumbar syrinx. 2. No MR evidence of cord tethering. 