Abstract

背景与目的存在表皮生长因子受体(epidermal growth factor receptor, EGFR)突变的非小细胞肺癌(non-small cell lung cancer, NSCLC)患者对EGFR酪氨酸激酶抑制剂(tyrosine kinase inhibitor, TKI)治疗有良好反应。与检测EGFR突变的分子水平手段相比,免疫组织化学法(immunohistochemistry, IHC)价格低廉,操作简便、迅速,易开展。本研究旨在探索免疫组化法检测EGFR突变的准确性。方法选取97例NSCLC患者的手术或组织活检标本行EGFR特异性抗体的免疫组化染色,分析染色阳性标本的临床病理特征,并继续接受液相芯片检测验证是否存在突变;新收集40例被证实为EGFR突变的手术标本接受免疫组化染色,计算免疫组化法检出突变灵敏度。结果97例NSCLC标本,17例染色阳性,染色阳性标本好发于女性、腺癌、不吸烟患者中,其染色阳性标本中,76.9%实际存在突变。40例EGFR突变标本中,免疫组化法检出突变的灵敏度为40%。结论免疫组化法染色评分为强阳性的标本结果准确,但该方法灵敏度不甚理想,不同研究者所得结果差异较大,临床推广是否可行仍有待进一步探讨。

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