新辅助化疗、放疗及辅助治疗在可切除食管癌中起什么作用?
What is the role of neoadjuvant chemotherapy, radiation, and adjuvant treatment in resectable esophageal cancer?
作者信息
Altorki Nasser, Harrison Sebron
机构信息
Department of Cardiothoracic Surgery, Division of Thoracic Surgery, New York Presbyterian Hospital, Weill Cornell Medical College, New York, NY, USA.
出版信息
Ann Cardiothorac Surg. 2017 Mar;6(2):167-174. doi: 10.21037/acs.2017.03.16.
The majority of patients with operable esophageal cancers present with locally advanced disease, for which surgical resection as a sole treatment modality has been historically associated with poor survival. Even following radical resection, most of these patients will eventually succumb to their disease due to distant metastasis. For this reason, there has been intense interest in the role of neoadjuvant therapy. Neoadjuvant therapy primarily consists of either chemotherapy, radiation therapy, or a combination of the two. Multiple studies of variable scope, design, and patient characteristics have been conducted to determine whether neoadjuvant therapy is warranted, and-if so-what is the best modality of treatment. Despite nearly three decades of study, decisions regarding neoadjuvant therapy for esophageal cancer remain controversial. Regardless, the available evidence provided by large, prospective studies supports preoperative chemotherapy as opposed to surgery alone. Therefore, in our opinion, there is no longer any question as to whether induction therapy is appropriate for locally advanced esophageal cancer. Less clear, however, is the evidence that the addition of radiation to chemotherapy in the preoperative setting is superior to neoadjuvant chemotherapy alone. Our group generally advocates for neoadjuvant chemotherapy alone followed by radical esophageal resection. The data for adjuvant therapy are soft, and particularly troubling is the high rate of treatment drop out in trials studying adjuvant therapy. Therefore, we strongly prefer neoadjuvant chemotherapy and reserve adjuvant chemotherapy for those rare, highly selected patients-patients with T1 tumors, for example-who do not receive neoadjuvant treatment and are found to have occult nodal disease at the time of surgery.
大多数可手术切除的食管癌患者就诊时已处于局部晚期,历史上单独将手术切除作为唯一治疗方式与较差的生存率相关。即使在根治性切除术后,这些患者中的大多数最终仍会因远处转移而死于疾病。因此,人们对新辅助治疗的作用产生了浓厚兴趣。新辅助治疗主要包括化疗、放疗或两者联合。已经开展了多项范围、设计和患者特征各异的研究,以确定是否有必要进行新辅助治疗,如果有必要,最佳的治疗方式是什么。尽管经过了近三十年的研究,但关于食管癌新辅助治疗的决策仍存在争议。无论如何,大型前瞻性研究提供的现有证据支持术前化疗而非单纯手术。因此,在我们看来,诱导治疗是否适用于局部晚期食管癌已不再有任何疑问。然而,术前化疗联合放疗优于单纯新辅助化疗的证据尚不明确。我们团队一般主张单独进行新辅助化疗,然后进行根治性食管切除术。辅助治疗的数据并不确凿,尤其令人担忧的是,在研究辅助治疗的试验中治疗中断率很高。因此,我们强烈倾向于新辅助化疗,而将辅助化疗留给那些罕见的、经过严格筛选的患者,例如T1期肿瘤患者,这些患者未接受新辅助治疗,且在手术时发现有隐匿性淋巴结疾病。