title: Reversible tonsillar prolapse and syringomyelia after embolization of a tectal arteriovenous malformation. Case report and review of the literature.
abstract: The authors report the case of a 21-year-old woman who presented with headaches, frequent sensations of loss of equilibrium, and intermittent strabismus. A tectal arteriovenous malformation (AVM) was diagnosed based on magnetic resonance (MR) imaging findings. The AVM drained toward the straight sinus and was associated with a tonsillar prolapse (Chiari malformation Type I [CM-I]) and cervical syringomyelia. The tectal AVM was embolized with N-butyl cyanoacrylate, and disconnection of about 80% of the lesion was obtained. All clinical symptoms resolved after embolization, and radiosurgery was proposed to treat the malformation remnant. A control MR image confirmed the regression of the tonsillar prolapse and the disappearance of the syrinx. This report emphasizes that CM-I and syringomyelia may be acquired and related to hydrovenous disorders.
authors: Department of Diagnostic and Therapeutic Neuroradiology, Hôpital Foch, Suresnes, France. g.rodesch@hopital-foch.org
authors: Georges
authors: G
authors: Rodesch
authors: Bernard
authors: B
authors: Otto
authors: Micheline
authors: M
authors: Mouchamps
authors: Jacques
authors: J
authors: Born
mesh_terms: D000328:Adult; D001139:Arnold-Chiari Malformation / Q000209:etiology / Q000473:pathology*; D004621:Embolization, Therapeutic; D005260:Female; D006801:Humans; D002538:Intracranial Arteriovenous Malformations / Q000150:complications* / Q000473:pathology / Q000628:therapy*; D012075:Remission, Spontaneous; D013595:Syringomyelia / Q000209:etiology / Q000473:pathology*; D003336:Tectum Mesencephali