Pseudoaneurysm of the basilar artery presenting with epistaxis.

The internal carotid artery is the most commonly affected artery in pseudoaneurysm presenting with epistaxis. Basilar arterial pseudoaneurysm is usually associated with intracranial haemorrhage. We report a basilar artery pseudoaneurysm after endoscopic surgery for clival chordoma, leading to epistaxis. The mechanism of epistaxis and strategy of embolisation are discussed.