Protein C or protein S deficiency is also sometimes suspected when a venous thromboembolism develops in an unusual site like the portal, mesenteric, or cerebral veins.

当静脉血栓栓塞出现在不常见的部位时，也要怀疑蛋白C或蛋白S缺乏症，比如门静脉、肠系膜静脉或脑部静脉。

Since warfarin can lower the levels of protein C and protein S, it is very important that a patient does not take warfarin for at least 2-4 weeks prior to being tested for protein C or protein S deficiency.

由于华法林能够降低蛋白C和S的水平，所以在进行蛋白C和S缺乏症检查之前一定要确保患者至少在2-4周内没有服用过华法林。