Venous thrombosis Abnormal cerebral venous sinus morphology Cerebral venous sinus thrombosis 2021-04-07T16:35:17Z An intracranial thrombosis of the venous sinuses. These typically present with headache, seizures or venous stroke secondary to raised cerebral venous pressure. Cerebral venous sinus thromboses usually affect larger areas of brain parenchyma than those affected by cerebral vein thromboses.