Abstract
Stage IIIA non-small cell lung cancer (NSCLC) with ipsilateral mediastinal lymph node metastases (N2) is a heterogeneous disease with differing prognoses. In this study, we retrospectively investigated the prognostic value of the expression of 10 molecular markers in 87 patients with stage IIIA pN2 NSCLC treated with radical surgery. Primary tumor tissue microarrays (TMAs) were constructed and sections used for immunohistochemical analysis of epidermal growth factor receptor, ErbB-2, c-kit, cyclooxygenase-2, survivin, bcl-2, cyclin D1, cyclin B1, metalloproteinase (MMP)-2, and MMP-9. Univariate and multivariate analyses and unsupervised hierarchical clustering analysis of clinical pathologic and immunostaining data were performed. Bcl-2 (p < 0.0001) and cyclin D1 (p = 0.015) were more highly expressed in squamous cell carcinoma (SCC), whereas MMP-2 (p = 0.009), MMP-9 (p = 0.005), and survivin (p = 0.032) had increased expression in other histologic subtypes. In univariate analysis, SCC histology and cyclin D1 expressions were favorable prognostic factors (p = 0.015 and p < 0.0001, respectively); by contrast, MMP-9 expression was associated with worse prognosis (p = 0.042). In multivariate analysis, cyclin D1 was the only positi...Continue Reading
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