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We have developed an experimental model of spinal cord compression in rats. Tumor injected anterior to the T-12 vertebral body grows through the intervertebral foramina to compress the cord and produces paraplegia in 3 to 4 weeks. Evidence for vasogenic edema in spinal cord compressed by tumor includes increased water content, leakage of horseradish peroxidase into gray matter, and histologic evidence of edema. The vascular supply to the cord overlying the tumor appears to be compromised. Both spinal cord edema and clinical symptoms are lessened by treating symptomatic animals with dexamethasone.
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