The value of immunochemistry staining of TTF1, CK7, P63 and CK5/6 in the differential diagnosis of non-small cell lung cancer / 中国医师杂志

ABSTRACT

Objective To evaluate the clinical value of the immunochemistry staining of thyroid transcription factor-1 (TTF-1), cytokeratin7 (CK7), P63, and cytokeratin5/6 (CK5/6) in the bronchoscop-ic forceps biopsy specimen in the differential diagnosis of non-small cell lung cancers.Methods Totally 143 cases of non-small cell lung cancers from Department of Respiratory and Department of Oncology from Nov 2012 to Jan 2014 were diagnosed with pathological examinations of the bronchoscopic forceps biospy.The sen-sitivity and specificity of TTF-1, CK7, P63, and CK5/6 of forceps biopsy at the diagnosis of lung adenocarci-noma and squamous cell carcinoma were calculated.Results The expressions of TTF-1 and CK7 in the pul-monary adenocarcinomas were higher than the pulmonary squamous cell cancer ( P <0.01).The diagnosis sensitivity and specificity of TTF-1 in the pulmonary adenocarcinoma were 85.1%(63/74) and 98.6%(68/69), respectively.The diagnosis sensitivity and specificity of CK7 in the pulmonary adenocarcinoma were 82.4%(61/74) and 91.3%(63/69), respectively.The diagnosis sensitivity and specificity of P63 in the pulmonary squamous cell cancer were 97.1% ( 67/69 ) and 89.2% ( 66/74 ) , respectively.The diagnosis sensitivity and specificity of CK5/6 in the pulmonary squamous cell cancer were 79.7%(55/69) and 89.2%(66/74), respectively.The combined expression of CK7(+)/TTF-1(+) in the pulmonary adenocarcinoma was higher than the pulmonary squamous cell cancer ( P <0.01).The combined expression of P63(+)/CK5/6(+) in the pulmonary squamous cell cancer was higher than the pulmonary adenocarcinoma ( P <0.01).Conclusions The combination use of the immunochemistry staining of TTF-1, CK7, P63, and CK5/6 helps to differentiate lung adenocarcinoma and squamous cell cancer.