短語詞組短語portal stem vein tumor thrombus 門靜脈主乾癌栓microscopic portal vein tumor thrombus 分爲(wèi)鏡下癌栓macroscopic portal vein tumor thrombus 和肉眼癌栓portal vein tumor thrombus occurrence 門脈癌栓 返回 portal vein tumor thrombus