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A 70-year-old male presented with progressive consciousness disturbance. He had a history of cerebrovascular accident in the left cerebral hemisphere. The initial diagnosis was newly developed extensive left cerebral hemispheric infarction based on computed tomography. However, magnetic resonance imaging and surgical findings were consistent with chronic subdural hematoma (CSDH). The preexisting neurological disease may have allowed such unexpected CSDH expansion.
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Shimizu et al. (2002) studied this question.
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