Postphlebitic syndrome is venous insufficiency that develops following deep vein thrombosis. Other less common symptoms include nausea, vomiting, pancreatitis, diabetes or recurrent venous thrombosis. Most cases of cerebral venous sinus thrombosis are due to hypercoagulability. The headache may be the only symptom of cerebral venous sinus thrombosis. A very small proportion is due to cerebral venous sinus thrombosis. Additional mechanisms of peripheral artery disease including arterial spasm, thrombosis, and fibromuscular dysplasia. There is an association between the D-dimer blood test and cerebral venous sinus thrombosis. Decreased activity leads to hypofibrinolysis, which can result in thrombosis or embolism. It is unclear whether these individuals are at increased risk for "recurrent" venous thrombosis. Digestion of vascular walls results in thrombosis and hemorrhage. This inflammation leads to arterial stenosis, thrombosis, and aneurysms. Some people have a higher risk of developing thrombosis and its possible development into thromboembolism. In their study, no hepatic artery thrombosis or wound infection was noted. Argatroban is used as an anticoagulant in individuals with thrombosis and heparin-induced thrombocytopenia. Anticoagulants are often used to treat acute deep vein thrombosis.