Intracerebral venous angioma with arterial blood supply: a mixed angioma.

An 18-year-old man was operated upon with a diagnosis of intracerebral hematoma. Although the angiogram of the right carotid artery demonstrated the characteristic umbrella appearance of the venous angioma in the parietal lobe, fine arterial branches supplying the vascular malformation were noted in the preoperative angiogram. At the operation, no nidus was found, and delicate angiomatous networks with red veins were observed around the hematoma cavity. Histologic examination of the angiomatous network proved it to be an arteriovenous malformation. It was a mixed angioma, which combined venous angioma and arteriovenous malformations. Clinical, angiographic, and pathological features of intracerebral venous angiomas with arterial components were reviewed from the literature.