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Multi-institutional analysis of T3 subtypes and adjuvant radiotherapy effects in resected T3N0 non-small cell lung cancer patients
- Multi-institutional analysis of T3 subtypes and adjuvant radiotherapy effects in resected T3N0 non-small cell lung cancer patients
- Choi Y.; Lee I.J.; Lee C.Y.; Cho J.H.; Choi W.H.; Yoon H.I.; Lee Y.-H.; Lee C.G.; Keum K.C.; Chung K.Y.; Haam S.J.; Paik H.C.; Lee K.K.; Moon S.R.; Lee J.-Y.; Park K.-R.; Kim Y.S.
- Ewha Authors
- SCOPUS Author ID
- Issue Date
- Journal Title
- Radiation Oncology Journal
- vol. 33, no. 2, pp. 75 - 82
- Adjuvant radiotherapy; Non-small cell lung cancer; Prognostic factor
- Department of Radiation Oncology
- Purpose: We evaluated the prognostic significance of T3 subtypes and the role of adjuvant radiotherapy in patients with resected the American Joint Committee on Cancer stage IIB T3N0M0 non-small cell lung cancer (NSCLC). Materials and Methods: T3N0 NSCLC patients who underwent resection from January 1990 to October 2009 (n = 102) were enrolled and categorized into 6 subgroups according to the extent of invasion: parietal pleura chest wall invasion, mediastinal pleural invasion, diaphragm invasion, separated tumor nodules in the same lobe, endobronchial tumor <2 cm distal to the carina, and tumor-associated collapse. Results: The median overall survival (OS) and disease-free survival (DFS) were 55.3 months and 51.2 months, respectively. In postoperative T3N0M0 patients, the tumor size was a significant prognostic factor for survival (OS, p = 0.035 and DFS, p = 0.035, respectively). Patients with endobronchial tumors within 2 cm of the carina also showed better OS and DFS than those in the other T3 subtypes (p = 0.018 and p = 0.016, respectively). However, adjuvant radiotherapy did not cause any improvement in survival (OS, p = 0.518 and DFS, p = 0.463, respectively). Only patients with mediastinal pleural invasion (n = 25) demonstrated improved OS and DFS after adjuvant radiotherapy (n = 18) (p = 0.012 and p = 0.040, respectively). Conclusion: The T3N0 NSCLC subtype that showed the most favorable prognosis is the one with endobronchial tumors within 2 cm of the carina. Adjuvant radiotherapy is not effective in improving survival outcome in resected T3N0 NSCLC. © 2015. The Korean Society for Radiation Oncology.
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