Journal
JOURNAL OF SURGICAL ONCOLOGY
Volume 94, Issue 7, Pages 599-606Publisher
WILEY-LISS
DOI: 10.1002/jso.20644
Keywords
stage IIIA NSCLC; mediastinoscopy; N2 disease; neoadjuvant chemotherapy; adjuvant chemoradiotherapy; downstage; survival
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Background and Objectives: CALGB 8935 was a phase II protocol for mediastinoscopically staged IIIA (N2) non-small cell lung cancer. Induction cisplatin/vinblastine chemotherapy was followed by surgical resection, adjuvant cisplatin/vinblastine, and radiotherapy. We now evaluate the prognosis of pathologic nodes. Methods: Failure-free survival was calculated from a landmark 3 months after resection to account for heterogeneity in adjuvant therapy. Results: Nine of 42 (21%) resected patients had no residual N2 disease. This subset of 9 had a median failure-free interval of 47.8 months from landmark, whereas the 33 patients (79%) with persistent N2 disease had a median failure-free survival of 8.2 months from landmark (P=0.01). Although 21/42 (50%) had an incomplete resection (positive highest resected node and/or margin), completeness of resection did not influence failure-free survival. There were 3 distant and no local recurrences among the N2 negative group, and 12 local recurrences among patients with residual N2 disease (P=0.041). Conclusions: These data suggest: (1) persistent N2 disease following induction chemotherapy is unfavorable; (2) patients downstaged to N2 negative may benefit from surgical resection; however, (3) 33% of N2 negative patients suffered disease relapse.
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