Cesas Alvydas, Bagajevas Aleksandras
Department of Chemotherapy, Klaipeda Hospital, 5808 Klaipeda, Lithuania.
Medicina (Kaunas). 2004;40 Suppl 1:161-5.
While still relatively uncommon in many countries, esophageal cancer is fatal in the vast majority of cases. In the USA, estimated 13,100 of new cases were diagnosed in 2002. In Lithuania, 163 new cases were diagnosed in 2001. Evidence for an association between environment, diet and esophageal cancer comes from the profound differences in incidence observed in different parts of the world. While the overall outlook for patients diagnosed with esophageal cancer has improved in the last 30 years, most patients are still present with advanced disease and their survival remains poor. Commonly etiology and risk factors of esophageal cancer are: cigarettes and alcohol, diet and other genetics factors. Only in 50% of patients with esophageal cancer clinically localized disease is present. National Comprehensice Cancer Network (NCCN) guidelines state that patients with clinically localized disease may be treated with resection or chemotherapy plus radiation. The overall survival rates for either surgery alone or combined chemotherapy and radiation appear equivalent. Chemoradiation as primary management of localized esophageal cancer has been shown to be superior in radiation alone. A series of randomized trials have demonstrated that adjuvant postoperative chemoradiation does not offer a survival advantage to patients with esophageal cancer. The superiority of preoperative chemoradiation over surgery alone in esophageal cancer has been demonstrated in a prospective trials. Recently published phase I and II studies have demonstrated moderate response rates to taxanes in esophageal cancer. Taxanes and irinotecan in combinations with platinum compounds and fluoropyrimidines are being tested in regimes with radiation.
尽管食管癌在许多国家仍相对不常见,但在绝大多数情况下是致命的。在美国,2002年估计有13100例新病例被诊断出来。在立陶宛,2001年有163例新病例被诊断出来。环境、饮食与食管癌之间存在关联的证据来自于世界各地观察到的发病率的巨大差异。尽管在过去30年中,被诊断为食管癌的患者的总体前景有所改善,但大多数患者仍表现为晚期疾病,其生存率仍然很低。食管癌常见的病因和风险因素包括:吸烟和饮酒、饮食以及其他遗传因素。只有50%的食管癌患者存在临床局限性疾病。美国国立综合癌症网络(NCCN)指南指出,临床局限性疾病的患者可以接受手术切除或化疗加放疗。单独手术或联合化疗和放疗的总体生存率似乎相当。作为局限性食管癌的主要治疗方法,放化疗已被证明优于单纯放疗。一系列随机试验表明,辅助性术后放化疗并不能为食管癌患者带来生存优势。在一项前瞻性试验中已证明术前放化疗在食管癌治疗中优于单纯手术。最近发表的I期和II期研究表明,紫杉烷类药物对食管癌有中等反应率。紫杉烷类和伊立替康与铂类化合物和氟嘧啶联合使用正在放疗方案中进行测试。