title: A case of cortical vein thrombosis with the cord sign.
abstract: BACKGROUND
  Computed tomography is performed in suspicious cases of cerebral venous thrombosis. Although an empty delta sign is not uncommonly reported, a cord sign is rarely reported. But this is, if present, pathognomonic, especially in the case of cortical vein thrombosis.
  
  
  METHODS
  A young man with antithrombin III deficiency sought emergency treatment for headache and seizure. Noncontrast computed tomography showed a typical cord sign in multiple sections. It seemed to be independent from the adjacent pathologic findings in most sections. Brain magnetic resonance imaging verified it as a thrombosed vein in conjunction with acute venous infarction.
  
  
  CONCLUSIONS
  The cord sign should be considered for early and accurate diagnosis of cortical vein thrombosis.
authors.affiliation: Department of Neurology, Neuroscience Research Institute, Seoul National University Hospital, Clinical Research Institute, Seoul, Korea.
authors.forename: Tae-Beom
authors.initials: TB
authors.lastname: Ahn
authors.forename: Jae-Kyu
authors.initials: JK
authors.lastname: Roh
mesh_terms: D000328:Adult; D020152:Antithrombin III Deficiency / Q000150:complications; D002540:Cerebral Cortex / Q000098:blood supply*; D002550:Cerebral Veins / Q000000981:diagnostic imaging* / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D011859:Radiography; D012720:Severity of Illness Index; D020246:Venous Thrombosis / Q000175:diagnosis* / Q000209:etiology