There has been a dramatic improvement following posterior fossa decompression, with resection of the margin of occiput, posterior arch of C1, with marked decompression of the foramen Magnum. The syrinx has dramatically decreased in volume. There is no evidence of complication of the surgery. There is no hydrocephalus. Cerebral parenchymal signal intensity and architecture are within normal limits. A moderate-sized C5/6 disc protrusion persists, now more prominent than on
prior imaging.
Conclusion:
A dramatic response to posterior fossa decompression, with a marked decrease in degree of tonsillar herniation, and in the volume of the cervical cord syrinx. Persistent cervical disc protrusion.