A case of post-traumatic syringomyelia. neuropathological findings after 1 year of cystic drainage

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Abstract
A 58-year-old man sustained C4–C5 post-traumatic myelopathy with C3–C4 subluxation, slight compression of C3 vertebral body, C4 spinous process fracture and C6 compression fracture. He subsequently developed syringomyelia from C4 to C6, which was shunted into the subarachnoid space. Postoperatively, there was some but insignificant improvement of his symptoms although a postoperative metrizamide spinal computerised tomography showed compelte drainage of the cyst. This patient died 1 year later. Autopsy examination of the spinal cord showed extensive damage of the posterior half of the cord at C3–C4 but the damage was much less extensive from C4 to C6 (where the syrinx was located), affecting mainly the right dorsal column at C4 and the right dorsal column and right anterior horn at C5–C6. In this patient, the syrinx developed in the partially damaged segments of the cord at the level of the spinal fractures and complete drainage of the cyst was not followed by satisfactory relief of his symptoms.