Spontaneous hemorrhage from a cerebral venous malformation related to thrombosis of the central draining vein: demonstration with angiography and serial MR.

A cerebral venous malformation ruptured after acute thrombosis of its central draining venous channel, leading to intracerebral hemorrhage. The CT, MR, and angiographic studies unequivocally demonstrated subsequent progressive recanalization of the malformation, providing proof that venous malformations can spontaneously bleed and that venous thrombosis may be associated with, and perhaps produce, the hemorrhage.