Intracerebral arteriovenous malformation fed by both ethmoidal arteries

A case of right-sided frontal intracerebral arteriovenous malformation fed mainly by both ethmoidal arteries is reported. The nidus was located intracerebrally, although its main feeders were dural arteries. It was drained partially through an intracerebral abnormal vein with aneurysmal dilatation of its proximal portion into the vein of Rosenthal and the straight sinus. An acute spontaneous intracerebral hematoma was the cause of the clinical symptoms. The etiology, neuroradiology, and surgical treatment of this rare entity are discussed.