定量细胞化学显示,人正常组织和良性肿瘤的细胞DNA含量为二倍体,但大多数恶性实体瘤为异倍体,而且后者的细胞增殖率增高。这些指标对癌瘤临床诊断、预后和治疗都有重要意义。因此,值得进一步探查癌前组织的细胞特征。我们分析了十例经光纤维内窥镜从大肠取得的息肉活检材料。除作切片观察外,将小块组织切成微细颗粒,散布于含 Quantitative cytochemistry showed that the DNA content of human normal tissue and benign tumors was diploid, but most malignant solid tumors were aneuploid and the latter had an increased cell proliferation rate. These indicators are important for the clinical diagnosis, prognosis and treatment of cancer. Therefore, it is worth further exploring the cell characteristics of precancerous tissues. We analyzed ten cases of polyp biopsy material obtained from the large intestine by optical fiber endoscopy. In addition to slicing observations, the small pieces of tissue were cut into fine particles dispersed in