Methods:The expression of MMP-9 and TIMP-1 of 86 cases of ESC and that of 42 cases of normal esophageal mucosa were detected by immmunohistochemistry (the method of streptaridin-peroxidase,SP).

• 方法 采用免疫组织化学法(S-P法)检测86例ESC组织及42例食管正常粘膜组织中MMP-9、TIMP-1的表达情况。