title: Magnetic resonance venography in intracranial veno-occlusive disease.
abstract: OBJECTIVE
  To identify the common MR Vfindings in the patient diagnosed intracranial veno-occlusive disease at Ramathibodi Hospital and to identify the underlying conditions that probably predisposed the patient to the intracranial veno-occlusive disease.
  
  
  METHODS
  Sixty-four patients with clinically suggestive intracranial veno-occlusive disease who underwent MRV were reviewed in terms of signs and symptoms, MRV methods, MRV findings, and clinical diagnosis after report MRV In cases diagnosed to have intracranial veno-occlusive disease, the patients' records were reviewed to identify predisposing conditions.
  
  
  RESULTS
  Thirty-four patients were diagnosed to have intracranial veno-occlusive disease. The common findings were lack of typical high flow signal from a sinus that did not appear aplastic or hypoplastic, frayed appearance of flow signal from a sinus at a later stage of the thrombus, and collateral vessels and cerebral hemorrhage. The common sites were superior sagittal sinus, and left and right transverse sinuses. Hypoplasia, a normal variation, was incidentally found in eight patients (12.5%). The most common hypoplastic site was the left transverse sinus. Contributing factors in patients diagnosed to have intracranial veno-occlusive disease in the present series were birth control pill in take, tumor (meningioma, and malignant schwannoma of the scalp), blood dyscrasia, AVM, hypotension, and abscess. The causes of intracranial venous thrombosis could not be identified in seven patients (21%).
  
  
  CONCLUSIONS
  The common MR Vfinding in acute intracranial veno-occlusive disease was lack of typical high flow signal from a sinus while frayed appearance of flow signal from a sinus was the common direct sign in chronic condition. In the present series, birth control pill intake was the most common contributing factor
authors.affiliation: Department of Radiology, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand. pamada2003@yahoo.com
authors.forename: Pamada
authors.initials: P
authors.lastname: Suwonpanich
authors.forename: Jiraporn
authors.initials: J
authors.lastname: Laothamatas
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002561:Cerebrovascular Disorders / Q000175:diagnosis* / Q000473:pathology; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010690:Phlebography; D012189:Retrospective Studies