根据病变性质不同及含血量的多少可以表现为肉眼血精，含血凝块及镜下血精。
According to the different natures and contain health lesions of how many can be expressed to the naked eye, including pure blood blood clots and under mirror of blood.
方法：对382例结直肠癌患者粪便隐血试验与肉眼血便、癌胚抗原（CEA）、肿瘤部位、病理分型、肿瘤分期的关系进行分析。
Methods: The correlation of FOBT with gross blood stool, carcinoembryonic antigen (CEA), tumor site, histopathologic type and the stage of tumor was analyzed in 382 patients with colorectal cancer.
出血形成的血铁黄素使病变肉眼观察呈深棕色。
The hemosiderin from the hemorrhage produces the grossly brown color.
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