06.Some epithelia are accessible enough, such as the cervix, that cancer screening can be done by sampling some of the cells and sending them to the laboratory. Here is a cervical Pap smear in which dysplastic cells are present that have much larger and darker nuclei than the normal squamous cells with small nuclei and large amounts of cytoplasm.

06.某些上皮细胞如宫颈细胞，容易取材送检找癌细胞。图示宫颈脱落细胞，见分化不良细胞体积大，核深染和核小，胞浆丰富的正常上皮细胞。