Analysis correlating clinical features and prognosis in the resected N2 non-small cell lung cancer / 中华胸心血管外科杂志

ABSTRACT

Objective Non-small-cell lung cancer with ipsilateral mediastinal lymph node metastasis (N2) belongs to heterogeneous subgroup. We analyzed the prognosis of patients with resected N2 NSCLC to determine the clinical significance. Methods The present study comprised 146 consecutive patients whom underwent surgical resection of N2 NSCLC between January 1997 and January 2000. Histological type, location, T primary tumor status, operation mode, clinical N2 (cN2) factor, N2 level(single or multiple), number of positive nodes(N2-num), and the cycles of adjuvant chemotherapy were estimated from the date of operation using the Kaplan-Meier and Log Rank analysis. The Cox regression model evaluated the influence of factors on the survival. Results The 3-and 5-year survival rate of these N2 NSCLC patients were 19.86% and 14.56%, respectively. The patients with tumor in the right lower lobe showed a significantly longer survival than left lobes. The histological type, tumor location, cN2 factor, N2 level and N2-number were associated with survival. A multivariate analysis using Cox regression identified 4 factors of prognosis tumor site, T status, N2 level and clinical N2 status. Conclusion This article has identified N2 NSCLC subgroups and found that patients with mN2, N2L1 and single N2 have better prognosis.