Reason: syrinx, yearly follow up History: yearly eval for changes. History of Chiari decompression. Cervical spine:Expansion of the subarachnoid space at the level of the midline from suboccipital decompression and removal of the posterior arch of C1 appears similar to the prior exam. Alignment is anatomic. Vertebral body heights are intact. No abnormal marrow signal. Disc spaces are intact. Subtle trace prominence of the central canal from C6-C7 to C7-T1 without syrinx formation appears similar to the prior exam. Minimal broad-based disc bulges at C4-C5, C5-C6 and C6-C7 without significant spinal or neural foraminal narrowing at any level.Thoracic spine:There is a small syrinx extending from T2-T3 to T5-T6 which appears similar in size and extent to the prior exam. It measures a maximum of 3.0 x 1.5 mm, unchanged. There is mild dextroscoliosis of the thoracic spine, otherwise alignment is anatomic. Vertebral body heights and disc spaces are intact. No abnormal marrow signal. No new areas of abnormal signal within the cord.Lumbar spine:Alignment is anatomic. No abnormal marrow signal. No abnormal signal within the distal cord or conus which ends at T12-L1. Vertebral body heights and disc spaces are intact. There are broad-based disc bulges at L3-L4, L4-L5 and L5-S1 without significant spinal or neural foraminal stenosis.
Small syrinx of the upper thoracic cord is stable. Stable post-operative appearance from prior Chiari decompression.