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Deep cerebral venous thrombosis presenting as acute amnestic syndrome

A 45 year‐old man presented with a rapid onset of memory impairment Brain computed tomography showed multiple abnormal low density areas in the deep cerebral white matter. Magnetic resonance imaging revealed bilateral thalamic infarcts and extensive thrombosis of the vein of Galen and the straight sinus, which was confirmed by cerebral angiography. The only potential cause was protein S deficiency. Heparin therapy was started only after the occurrence of a pulmonary embolism. The outcome was excellent Deep cerebral venous thrombosis must be considered as a possible cause of amnestic syndrome. Clinical awareness and early use of anticoagulation may alter the usual fatal outcome.