title: Angiographic appearance of a huge retrocerebellar arachnoid cyst in an infant.
abstract: A detailed analysis of the angiographic findings with a congenital retrocerebellar arachnoid cyst in an infant is reported. The angiographic features are a huge retrocerebellar extra-axial avascular mass compressing and displacing the fourth ventricle anteriorly, dysgenesis of the cerebellum, a tight posterior fossa and transtentorial upward herniation of the monticulus and brainstem.
mesh_terms: D001099:Arachnoid; D001927:Brain Diseases / Q000000981:diagnostic imaging*; D002533:Cerebral Angiography; D002675:Child, Preschool; D003560:Cysts / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans