小细胞癌为肺癌的一个类型,表现为发病突然,病程短、伴有早期播散,化学治疗常有效。作者用胸腺嘧啶标记的数据法测定增殖瘤细胞的分裂周期和其各阶段(G_1,S_1,G_2,M)的时间及增殖细胞分数来阐明肿瘤生长的特点。瘤内注入标记的胸腺嘧啶后,将(注射过的)皮下结节、淋巴结和有肿瘤的骨髓针吸或切取活检,进 Small cell carcinoma is a type of lung cancer that manifests as sudden onset, short duration, early dissemination, and often effective chemotherapy. The authors used the thymidine labeling data method to determine the proliferative cell division cycle and its stages (G_1, S_1, G_2, M) time and proliferation cell fraction to elucidate the characteristics of tumor growth. After injecting labeled thymidine into the tumor, the (injected) subcutaneous nodules, lymph nodes, and tumor-bearing marrow are needled or harvested for biopsy.