RESUMO
Cerebral venous sinus thrombosis (CVST) is a rare type of cerebrovascular disease, accounting for about 0.5% of all strokes. About 4% of patients with CVST have supratentorial brain parenchymal lesions and brain edema sufficient to cause brain hernia and neurological deterioration, which is called malignant CVST. Malignant CVST refers to the clinical (loss of consciousness, unilateral or bilateral pupil dilation) and imaging signs of supratentorial cortical lesions (ischemia or hemorrhage) accompanied by tentorial hiatal hernia formation at the onset or after treatment with heparin. For patients with malignant CVST, decompressive craniectomy is not only a life-saving treatment, but also can make most patients achieve good functional outcome.