Methods Two-step immunohistochemical method was used to examine the expression of MMP-2 mAb in 32 specimens of hypophar yngeal carcinoma tissues and adjacent normal mucosa. Statistical comparison w as performed after grouping.

• 方法运用免疫组化二步法检测32例下咽癌组织及癌旁组织中MMP-2抗体的表达,按不同的标准分组后进行统计学处理。