title: [Pseudo-tumoral cerebellar infarction and Arnold-Chiari malformation].
abstract: A pseudo-tumoral cerebellar infarction developed in a 48-year-old man over the course of several days. External drainage improved the patients condition, and a subsequent operation showed a type I Arnold-Chiari malformation with cerebellar amygdalae descending to the level of C2. The infarcted postero-external part of the cerebellar lobe and the left amygdala were resected. The left postero-inferior cerebellar artery was thrombosed between the inferior border of the malformation and the posterior arch of C2. Almost total clinical recovery occurred. The Arnold-Chiari malformation had been clinically silent until the present infarction. A low dysraphia with a dermal sinus, sacral dehiscence and a low cord were present, but had caused no clinical disorders. The genetic origin of the dysraphism was confirmed by the presence of lumbosacral myelomeningocele with hydrocephalus in a relative of the patient. The relationship between postero-inferior cerebellar artery thrombosis and an Arnold-Chiari malformation is discussed: a causal relationship, already suggested in previous reports, is likely in the present case.
mesh_terms: D001139:Arnold-Chiari Malformation / Q000150:complications* / Q000601:surgery; D001932:Brain Neoplasms / Q000000981:diagnostic imaging; D002531:Cerebellum / Q000098:blood supply*; D003937:Diagnosis, Differential; D006801:Humans; D007238:Infarction / Q000150:complications / Q000000981:diagnostic imaging* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011859:Radiography; D014054:Tomography
vernacular_title: Infarctus pseudo-tumoral du cervelet et malformation d'Arnold-Chiari.