SVT presents with a lower incidence than deep vein thrombosis of the lower. Thrombosis is the medical term for a clot inside a blood vessel. La Trombosis Venosa Superficial Causas Y Tratamiento Canalsalud Thrombosis occurs when blood clots block your blood vessels. . It may be caused by injury immobility and other factors. Cerebral venous sinus thrombosis CVST cerebral venous and sinus thrombosis or cerebral venous thrombosis CVT is the presence of a blood clot in the dural venous sinuses which drain blood from the brain the cerebral veins or bothSymptoms may include severe headache visual symptoms any of the symptoms of stroke such as weakness of the face and limbs on one side. Complications include pulmonary embolism PE or a blood clot in the lungs which can be fatal phlebitis inflammation in the vein and leg ulcers. PubMed EMBASE and Science Citation Index were searched without language restrictions up to July 2007. Dee