论文部分内容阅读
食管癌是世界上最为常见的六大恶性肿瘤之一,显著的地域性分布差异是食管癌突出的流行病学特征,在食管癌的高发区和低发区其发病率可相差500倍[1-2]。中国是世界上食管癌发病率和死亡率最高的国家,每年新发食管癌病例约25万,占全世界新发食管癌病例的50%以上[2-3]。河南林州及
Esophageal cancer is one of the six most common malignant neoplasms in the world. The significant regional difference is the prominent epidemiological feature of esophageal cancer, which can be up to 500 times lower in esophageal cancer than in low-risk areas -2]. China is the country with the highest morbidity and mortality of esophageal cancer in the world. About 250,000 new cases of esophageal cancer occur each year, accounting for more than 50% of newly diagnosed esophageal cancer cases in the world [2-3]. Henan Linzhou and