化疗是恶性肿瘤一种非常重要的治疗手段,只能依靠用药后肿瘤的缓解率和患者的生存率来获得疗效信息。当得知所应用的化疗药物无效时,患者可能已经失去了尽早获得有效治疗的机会,延误了病情。同时,应用昂贵的化疗药物也造成了经济的损失。NSABP B-18试验的5年随访结果表明乳腺癌 Chemotherapy is a very important treatment of malignant tumors, and can only rely on the remission rate of tumor after treatment and the survival rate of patients to obtain the efficacy information. The patient may have lost the opportunity to receive effective treatment as early as possible, delaying their illness, knowing that the chemotherapy drug being used is invalid. At the same time, the use of expensive chemotherapy drugs has also caused economic losses. The 5-year follow-up of the NSABP B-18 trial showed breast cancer