食管癌是一个涉及C-myc等多个原癌基因和抑癌基因变化的常见恶性肿瘤。有关C-myc在食管癌中的表达研究并不多见，且多限于核酸分子水平的检测。而癌基因引起正常细胞的转化必须通过其编码产物——一致癌蛋白而起作用。本实验从蛋白表达水平上用免疫组化LAB方法检测食管瘤及癌旁 Esophageal cancer is a common malignancy involving changes of several protooncogenes and tumor suppressor genes such as C-myc. Studies on the expression of C-myc in esophageal cancer are rare and are mostly limited to the detection of nucleic acid molecules. Oncogenes, on the other hand, cause the transformation of normal cells to work through their encoded product, the consensus oncoprotein. This experiment uses immunohistochemical LAB method to detect esophageal neoplasia and adjacent cancer from the level of protein expression.