Objective To explore the protein-tyrosine-phosphatase 1B (PTP1B) expression and its prognostic significance in non-small-cell lung cancer (NSCLC) .Methods Immunohistochemical method of EnVision was applied to investigate the expression of PTP1B in lung specimens from 63 cases with NSCLC and 9 cases with pneumonia confirmed by pathological examination after surgical re- Objective To explore the protein-tyrosine-phosphatase 1B (PTP1B) expression and its prognostic significance in non-small-cell lung cancer (NSCLC). Methods Immunohistochemical method of EnVision was applied to investigate the expression of PTP1B in lung specimens from 63 cases with NSCLC and 9 cases with pneumonia confirmed by pathological examination after surgical re-