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。

After the brain tissue has taken up the oxygen and nutrients, the blood drains into superficial cerebral veins, or bridging veins, that also sit in the subarachnoid space.

在大脑吸收了血液中的氧气和营养后，血液回流至大脑浅静脉，也称为桥静脉；它们也在蛛网膜下隙中。