Partially thrombosed megadolichobasilar artery in an 8-year old child with recurrent episodes of somnolence

Abstract

Introduction: Intracranial aneurysms are rare in children, and mostly asymptomatic. The intracranial location accounts for 0,5–4,6% of all paediatric aneurysms. The incidence of a vertebro-basilar location was reported between 3,3 and 29,5%. A fusiform elongation of the basilar artery was named by Dandy (1947) “S-shaped-aneurysm“, and later by Boeri (1964) as megadolichobasilar artery. Between 250 and 300 cases were reported in the literature with a majority in the elderly population. Typically a megadolichbasilar artery becomes symptomatic in adults over the age of fifty, mostly due to atherosclerotic changes.