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✓ A case is reported in which bilateral subdural hematomas were caused by metastatic adenocarcinoma in the subdural membranes. This diffuse dural carcinomatosis was associated with widespread intravascular tumor growth and a marked vascular and fibrous proliferation, interpreted as a tumor-induced angiodesmoplasia. The hematomas resulted from separation and hemorrhage into this highly vascular abnormal areolar layer of the dura.
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Leech et al. (1974) studied this question.
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