长期口服足叶乙甙对转移性乳腺癌的疗效转移性乳腺癌（ＭＢＣ）仍然是难治愈的疾病，虽经多年努力生存期无明显改善。作者提出长期口服足叶乙甙治疗ＭＢＣ的化疗方案并对其抗肿瘤活性和药物耐受性进行评价。研究包括４３例ＭＢＣ，有可测量的肿瘤，至少经一种药物化疗；预... The long-term effect of oral epinephrine on metastatic breast cancer Metastatic breast cancer (MBC) remains a difficult-to-treat disease, although the longevity has not improved significantly over many years. The authors proposed long-term oral etoposide in the treatment of MBC chemotherapy and evaluated its anti-tumor activity and drug resistance. The study included 43 patients with MBC, measurable tumors, and at least one chemotherapy;