Subdural hematoma secondary to metastatic dural carcinomatosis

✓ 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.