Male, 2 years old, status post Chiari decompression with syrinx, one year follow-up from surgery. Postoperative findings are seen compatible with Chiari decompression including suboccipital craniectomy and resection of the posterior arch of C1. The cerebellar tonsils terminate above the level of the neo-foramen magnum, and demonstrate a relatively normal round morphology. The degree of CSF expansion along the posterior aspect of the foramen magnum appears similar to prior. Robust biphasic CSF flow is seen along the ventral neo-foramen magnum. Only a mild blush of flow related signal is seen dorsally through the neo-foramen magnum.A previously seen syrinx in the cervical region has decreased both in craniocaudal extent and in maximal diameter. The syrinx previously began at C4 and extended to the upper thoracic level. It is now only reliably detected at the C6 and C7 levels. The maximum dimension measures 1 mm, previously 2 mm.A larger syrinx cavity seen previously within the thoracic region has also decreased in craniocaudal extent, though the maximum caliber remains similar to prior. The syrinx previously extended from T4-5 down to T9, and currently extends from T5 to T8. The maximum caliber measures 7 x 7 mm, unchanged from prior.The conus tip terminates at L1 which is normal. No intraspinal masses are seen.Spinal alignment and vertebral body morphology are within normal limits. No concerning marrow signal abnormality is detected. The intervertebral discs are normal. No significant spinal canal or neuroforaminal stenosis is detected.
1.Demonstration of findings compatible with Chiari decompression. The cerebellar tonsils remain above the level of the neo-foramen magnum and show a round morphology.2.Robust CSF flow is seen along the ventral aspect of the neo-foramen magnum, with only a small amount of detectable flow dorsally.3.Interval decrease in caliber and longitudinal extent of a small cervical cord syrinx.4.Interval decrease in longitudinal extent of a large thoracic cord syrinx.I personally reviewed the Images and/or procedure with the Resident/Fellow and agree with this report.