Giant aneurysm of the vertebral artery in neurofibromatosis type 1: report of a case and review of the literature.

Cranial and cervical vessels are rarely involved in neurofibromatosis type 1. Stenoses and occlusion due to intimal or medial dysplasia are most often seen, followed by aneurysms. We report a rare asymptomatic giant aneurysm of the vertebral artery in a 59-year old man with von Recklinghausen's neurofibromatosis and review the literature.