title: Supracerebellar arachnoid cyst - A rare cause of acquired Chiari I malformation.
abstract: Chiari I malformation (CM) associated with a cervico-thoracic syrinx due to supracerebellar arachnoid cyst has not been reported in the literature. We report such a case, managed by fenestration of the arachnoid cyst and foramen magnum decompression (FMD), aiming to reduce the inferiorly directed pressure on the cerebellum and eliminate the craniospinal pressure dissociation respectively. Imaging done post-operatively showed upward displacement of the cerebellar tonsils with a decompressed craniovertebral junction and disappearance of the syrinx.
authors.affiliation: Christian Medical College, Department of Neurological Sciences, Ida Scudder Road, Vellore, Tamil Nadu 632004, India.
authors.forename: Biji
authors.initials: B
authors.lastname: Bahuleyan
authors.forename: Ankamma
authors.initials: A
authors.lastname: Rao
authors.forename: Ari George
authors.initials: AG
authors.lastname: Chacko
authors.forename: Roy Thomas
authors.initials: RT
authors.lastname: Daniel
mesh_terms: D000328:Adult; D016080:Arachnoid Cysts / Q000150:complications* / Q000473:pathology; D001139:Arnold-Chiari Malformation / Q000209:etiology*; D002531:Cerebellum / Q000473:pathology / Q000503:physiopathology; D015170:Cerebrospinal Fluid Pressure; D019299:Decompression, Surgical / Q000379:methods; D005539:Foramen Magnum / Q000473:pathology / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D012196:Review Literature as Topic; D013116:Spinal Cord / Q000473:pathology