Male, 4 years old, with tethered cord and syrinx, status post tethered cord repair. Yearly evaluation. Prominence of the central canal of the spinal cord is again seen in the low cervical and upper thoracic regions. Frank syringohydromyelia begins at approximately the T7 level and continues down to the conus. The craniocaudal extent of this abnormality is unchanged. Likewise, the maximal caliber of the syrinx is also not significantly changed, measuring approximately 4 x 4 mm at the T11 level, previously 5 x 4 mm.As on the prior examination, cerebellar tonsillar fullness at the level of the foramen magnum is again seen on the sagittal counting sequence. The conus tip terminates at the L1 level which is normal. Findings are again seen compatible with surgical tethered cord release at the L2-3 level. No intraspinal fatty material is observed. The nerve roots of the cauda equina disperse evenly through the distal thecal sac. On prone imaging, there is clear evidence of anterior displacement of the conus and cauda equina.Spinal alignment is anatomic. A normal complement of vertebral bodies is observed. Apart from surgical alterations in the lumbar spine, no abnormalities of vertebral body morphology or signal characteristics are seen. No significant spinal canal or foraminal stenosis is detected. As on the prior examination, the urinary bladder is fluid distended.
1.No significant change in the caliber or craniocaudal extent of thoracic syringohydromyelia.2.No evidence of spinal cord re-tethering.