A case is reported of spastic paraparesis due to a thoracic spinal arachnoid cyst. Symptoms occurred about 10 years after craniospinal injury. The histological examination revealed hemosiderin-containing macrophages trapped in the cyst wall. This finding and its possible pathogenetic implications are discussed, and the pertinent literature is reviewed.
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Spiegelmann et al. (1984) studied this question.
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