title: Case report: arachnoiditis following intracranial 'Thorotrast'.
abstract: A patient is reported with a painless, progressive cauda equina lesion due to arachnoiditis, the result of the contrast medium 'Thorotrast' (thorium dioxide) introduced into the brain over 30 years previously. Contrast medium introduced into the lumbar spine can give rise to aseptic adhesive inflammation (arachnoiditis). It rarely gives rise to clinical problems but, when it does so, is usually associated with back pain and only very rarely with progressive neurological deficit.
authors.affiliation: Department of Neurological Surgery, Royal Preston Hospital.
authors.forename: P M
authors.initials: PM
authors.lastname: Pandya
authors.forename: A J
authors.initials: AJ
authors.lastname: Keogh
mesh_terms: D000038:Abscess / Q000150:complications; D000328:Adult; D001100:Arachnoiditis / Q000139:chemically induced*; D001921:Brain / Q000000981:diagnostic imaging; D002420:Cauda Equina; D005119:Extravasation of Diagnostic and Therapeutic Materials / Q000150:complications; D006801:Humans; D008297:Male; D010523:Peripheral Nervous System Diseases / Q000139:chemically induced; D011859:Radiography; D012422:Rupture, Spontaneous; D013701:Temporal Bone; D013911:Thorium Dioxide / Q000009:adverse effects*; D013997:Time Factors
chemical_list: D013911:Thorium Dioxide