不同周期的新辅助化疗对乳腺癌疗效的影响

目的比较两组不同周期的新辅助化疗对乳腺癌疗效的影响及毒性反应。方法 75例局部进展期乳腺癌患者接受表阿霉素和紫杉醇 (epirubicinandpaclitataxel,ET)方案进行新辅助化疗 (neo adjuvantchemotherapy ,NAC)。其中有 39例完成 2个周期治疗 ,36例完成 4个周期治疗 ,对两组的疗效进行比较分析。结果NAC 2周期组的总有效率为 74 % (2 9/ 39) ,其中临床完全缓解(cCR) 1例 ,部分缓解 (PR) 2 8例 ,无变化 (NC) 10例 ;4周期组的总有效率 94 % (34/ 36 ) ,cCR 2 1例 ,PR 13例 ,NC 2例 ,其中包括病理完全缓解 (pCR) 9例 ,两组均无进展病例。 2周期组有 18例 (4 6 % )、4周期组为 2 7例 (75 % )肿大淋巴结消失。两组间毒性反应比较 ,在关节肌肉疼痛及神经毒性方面 ,4周期治疗组重于 2周期组。结论ET方案对局部进展期乳腺癌进行新辅助化疗 ,在肿瘤及淋巴结缩小 (降期 )效果方面 ,4周期组明显优于 2周期组。在毒性反应方面 ,除关节肌肉疼痛及神经毒性症状 4周期治疗组稍重于 2周期组外 ,在血液毒性及消化道反应方面两组差异无显著性。

Evaluation of neo-adjuvant chemotherapy with different cycles for locally advanced breast cancer

Objective To compare the efficacy and toxicity of different cycles of neo-adjuvant chemotherapy for locally advanced breast cancer. Methods Seventy-five patients with locally advanced breast cancer were treated with epirubicin (Epi) plus paclitaxel (TAX, ET regimen). Two cycles were used in 39 patients (2 cycles group) and 4 cycles were used in 36 patients (4 cycles group). Results The overall response rate (RR) was 74% (29/39) in 2 cycles group and 94% (34/36) in 4 cycles group. One patient got clinically complete response (CR), 28 cases had partial response (PR),10 with no change (NC) in 2 cycles group, while 21 patients showed CR including 11 patients with pathologically complete response, 13 with PR, and 2 with NC in 4 cycles group. There was no progression to advanced stage in either groups. Axillary lymph nodes were palpable in all 75 patients before ET regimen, lymph nodes became non-palpable in 46% (18/39) cases in 2 cycles group and in 75% (27/36) cases in 4 cycles group. Toxicities including leukopenia, gastroenteric reactions were similar in the 2 groups, though arthralgia, myalgia, and neurotoxicity were more common in 4 cycles group than 2 cycles group. Conclusion Neo-adjuvant chemotherapy with ET regimen for 4 cycles were more effective than 2 cycles to down staging locally advanced breast cancer. Toxicities including arthralgia, myalgia, and neurotoxicity were more common in 4 cycles group than 2 cycles group.