Intracranial venous system thrombosis (CVST) is a specific type of cerebrovascular disease characterized by obstruction of cerebral venous return and impaired absorption of cerebrospinal fluid caused by multiple etiologies. It accounts for about 0.5-1% of all strokes and can be classified by site: superficial veins, deep veins or venous sinuses in the brain. By nature, it can be classified as infectious or non-infectious. Clinical specificity is lacking and the rate of missed diagnosis is up to 73%. 40% of patients have a mean time to diagnosis of more than 10 days and can develop in all age groups, often without a history of hypertension, atherosclerosis, coronary artery disease, etc. Most of them have a subacute (48 hours to 30 days) or chronic (more than 30 days) onset. Signs and symptoms depend on the site, nature, size and degree of secondary brain damage of the venous (sinus) thrombosis, and can be unilateral or bilateral, or alternating between right and left. The patient may have acute or recurrent headache, optic papilledema, weakness and sensory disturbance of one limb, aphasia, hemianopia, epileptic seizures, isolated intracranial pressure elevation syndrome, varying degrees of consciousness or psychiatric symptoms.