Male, 11 years old, status post Chiari decompression with syrinx, 6 month follow-up. The vertebral body numbering system on the prior examination will be preserved which accounts for transitional vertebral body morphology with the last fully formed disc space designated L4-S1.Postoperative findings are again seen compatible with Chiari decompression including suboccipital craniectomy and resection of the posterior arch of C1. The caliber of the CSF space at the level of the neo-foramen magnum is unchanged. CSF flow signal along the ventral brainstem is slightly attenuated due to mild retroflexion of the dens, similar to prior. Mild flow related signal is seen along the dorsal aspect of the the neo-foramen magnum. The cerebellar tonsils demonstrate stable morphology and terminate at the level of C1.A focal cervical cord syrinx at the C2 level has increased very slightly in size, now measuring 6 x 6 x 13 mm, previously 6 x 5 x 12 mm. No other spinal cord abnormalities are seen.The conus tip terminates at the T12-L1 level which is normal. The cauda equina is unremarkable. Prominence of the ventral epidural soft tissues at C2 is a stable finding. No intraspinal mass is detected.Spinal alignment is anatomic. Vertebral body height and morphology are within normal limits. No concerning marrow signal abnormality is seen.The intervertebral discs are normal with no evidence of significant spinal canal or neuroforaminal stenosis.Intraperitoneal fluid is again seen. The urinary bladder is distended.
1.Redemonstration of postoperative findings status post Chiari decompression.2.The caliber of the CSF space at the foramen magnum, the morphology of the cerebellar tonsils, and degree of CSF flow through the foramen magnum are all unchanged.3.A focal cervical cord syrinx at the C2 level has increased very slightly in size. No new cord abnormalities are detected.4.Incidental note is again made of intraperitoneal fluid and distention of the urinary bladder.