title: Failed visualization of clot signal in cerebral venous thrombosis on initial MR imaging.
abstract: Currently, the combination of T1- and T2-weighted spin echo magnetic resonance imaging (MRI) sequences with MR venography is considered the best diagnostic tool for diagnosing cerebral venous thrombosis (CVT), because they allow positive identification of the thrombotic clot along with the disturbed venous flow signal. We report two patients in whom initial MRI with the mentioned techniques did not show a clot signal. In both patients anticoagulation was started despit lacking proof of CVT by imaging and both patients improved. Only on repeated MRI sinus clot signal could be confirmed.
authors: Dept. of Neurology, University of Genova, Italy.
authors: E
authors: E
authors: Cioli
authors: H
authors: H
authors: von Stockhausen
authors: M
authors: M
authors: Jauss
authors: R
authors: R
authors: Siekmann
authors: E
authors: E
authors: Stolz
mesh_terms: D000328:Adult; D000369:Aged, 80 and over; D003951:Diagnostic Errors; D038524:Diffusion Magnetic Resonance Imaging; D005260:Female; D006493:Heparin / Q000627:therapeutic use; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007262:Infusions, Intravenous; D018810:Magnetic Resonance Angiography; D008297:Male; D009460:Neurologic Examination; D012851:Sinus Thrombosis, Intracranial / Q000175:diagnosis* / Q000188:drug therapy; D054064:Transverse Sinuses / Q000473:pathology
chemical_list: D006493:Heparin