There were a few cells of apoptosis and of expressing PCNA only in the epithelial tissue of normal cervix tissue and the number of positive cells was less than 10% per microsopic field of vision.

• 正常子宫颈组织只有上皮组织内有少数凋亡细胞和表达PCNA的细胞，显微镜下每视野阳性细胞数均不超过10%25。