9-year-old male with hearing reformation, syrinx, and tethered cord. Brain: Redemonstrated are postoperative findings related to Chiari decompression and fourth ventricular stenting. The cerebellum assumes an unchanged configuration, with persistent low lying tonsils. There is also persistent retroflexion of the dens. There is persistent diminished CSF flow across the posterior craniocervical junction, with relatively intact flow across the anterior craniocervical junction, both unchanged in appearance. There is no change in the appearance of a subcentimeter cystic space within the collapsed fourth ventricle, adjacent to rightward aspect of the stent, itself unchanged in position. There is no evidence of hydrocephalus. There is no evidence of intracranial hemorrhage, mass, or acute infarct. The brain parenchyma appears unremarkable. There is mild scattered paranasal sinus opacification. Bilateral mastoid air cells remain clear. Spine: There has been no change in caliber of a long segment syrinx, measuring up to 6 mm in width, previously 6 mm. There is an unchanged fibrofatty filum terminale that measures up to 2 mm in width. The conus medullaris terminates at L2-3. These findings are unchanged. Upon prone maneuvering, the conus translates anteriorly, although a portion of the cauda equina does not.The vertebral column alignment is unchanged. The vertebral body heights are preserved. The paraspinal muscles are unchanged.
1.Stable postoperative findings relate to Chiari malformation treatment with unchanged configuration of the cerebellar tonsils demonstrating unchanged diminished CSF flow across the posterior craniocervical junction as well as an unchanged cystic space within the collapsed fourth ventricle adjacent to rightward aspect of a fourth ventricular stent.2.Unchanged long-segment syrinx.3.Unchanged fibrofatty filum terminale. Upon prone maneuvering, the conus translates anteriorly, although a portion of the cauda equina does not.