[Hyperhomocysteinemia-related cerebral venous thrombosis].

INTRODUCTION: Moderate hyperhomocysteinemia is a causal risk factor for atherosclerosis and venous thromboembolism. Recent researches have tried to find out a causal relationship. However, only a small number of cases have been reported on hyperhomocysteinemia and cerebral venous thrombosis in the world medical literature. CASE REPORT: We present the case of a 21 years old woman, and oral contraceptives taker, who consulted for a one week clinical picture of biparietal headache, nausea and vomiting. Examination revealed bilateral papilledema, and subsequent CT scan, MRI and MR angiography showed thrombosis of the left lateral sinus. Immunologic tests (antinuclear antibodies, antiphospholipid antibodies) were negative. Hypercoagulability studies showed persistent homocysteine high levels. The patient improved and was discharged after treatment with anticoagulants and therapeutic measures against brain edema. DISCUSSION: The 70 percent of the patients with thrombosis of the cerebral venous sinuses present hypercoagulable states, including moderate hyperhomocysteinemia. Several mechanisms are proposed for venous thrombosis in hyperhomocysteinemia, homocysteine induced endothelial dysfunction between others. Otherwise, oral contraceptives can increase the risk of venous thrombosis in other prothrombotic conditions. Folic acid and vitamins supplementation therapy are commented.