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MO22 - Advanced Disease and Outcomes (ID 103)
- Event: WCLC 2013
- Type: Mini Oral Abstract Session
- Track: Surgery
- Presentations: 1
MO22.08 - Surgical Resection of Stage IIIA-N2 non-small cell lung cancer: Should we still talk about the futile thoracotomy? (ID 825)
10:30 - 12:00 | Author(s): P. Dartevelle
Stage IIIA-N2 non-small cell lung cancer (NSCLC) is currently mainly managed with chemotherapy and radiation therapy with limited outcome. Whether surgical resection should be offered to patients with resectable IIIA-N2 NSCLC as part of a multi-modality approach with adjuvant or neoadjuvant treatment remains unclear. We sought to determine the long-term result of resected IIIA-N2 NSCLC in a single institution.
We reviewed the charts from a consecutive series of 263 patients with a mean age of 62 years (range, 37-68) undergoing lung resection and complete en bloc lymph node dissection for IIIA-N2 NSCLC from 01/2000 to 12/2011. Clinical N2 (cN2) patients were diagnosed preoperatively on chest CT scan and/or PET scan and were histologically proven by mediastinoscopy or EBUS. Patients with cN2 with a single site of mediastinal disease were occasionally treated with surgery upfront followed by adjuvant chemotherapy with or without radiation (cN2 adj, n=70). The remaining patients with cN2 disease were treated with neoadjuvant therapy followed by surgery (cN2 neoadj, n=55). Minimal N2 patients were diagnosed postoperatively on final pathology report and received adjuvant therapy (mN2, n=138).
Lung resection was a pneumonectomy in 75 patients and a lobectomy in 188 patients with a post-operative mortality of 1.3% and 3.1%, respectively. Adjuvant chemo- or chemoradiation therapy was administered in 181 patients. The overall 5-year survival was 43.6%, with no significant difference between the type of lung resection (pneumonectomy: 38.9% vs. lobectomy: 45.5%, p=0.18) or the number of mediastinal lymph node site involvement (1 site 44.8% vs. 37,7% for multiple sites, p=0.9). Long-term survival tended to be better for mN2 compared to cN2 (5-year survival of 50.4% vs. 35.9%, respectively; p=0.08). However, survival for cN2 was similar between neoadjuvant and adjuvant therapy (5-year survival of 30.3% vs. 40.2%, respectively; p=0.53). The number of mediastinal lymph node site involvement did not impact survival in patients with cN2 disease (1 site 37.6% vs 27.6% for multiple sites, p=0.59).
Surgery for Stage IIIA-N2 NSCLC achieved good long-term survival when combined with chemotherapy or chemo-radiation therapy in well selected patients. Long-term survival was similar in patients with clinical N2 disease whether they received adjuvant or neoadjuvant therapy. Surgery should be considered as part of a multimodality treatment for patients with stage III-N2 NSCLC.
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