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Ann Thorac Surg 2006;82:1808-1814
© 2006 The Society of Thoracic Surgeons
a Department of Epidemiology, University of Alabama at Birmingham School of Public Health and Emory University, Birmingham, Alabama, and Atlanta, Georgia
b Division of Cardiothoracic Surgery, Section of General Thoracic Surgery, University of Alabama at Birmingham, Birmingham, Alabama
c Division of Cardiothoracic Surgery, Section of Thoracic Surgery, Emory University, Atlanta, Georgia
Accepted for publication March 29, 2006.
* Address correspondence to Dr Cerfolio, Section of General Thoracic Surgery, Division of Cardiothoracic Surgery, University of Alabama at Birmingham, 1900 University Blvd, THT 720, Birmingham, AL 35294 (Email: rcerfolio{at}surg.uab.edu).
Presented at the Forty-second Annual Meeting of The Society of Thoracic Surgeons, Chicago, IL, Jan 30–Feb 1, 2006.
BACKGROUND: Treatment of non–small cell lung cancer depends on stage. Patients with T4 lesions represent a heterogeneous group.
METHODS: A case-control study of patients with pathologically proven, node-negative T4 lesions (T4 N0 M0) was conducted. Patients with T4 disease were stratified as T4 from a satellite nodule (T4-satellite) or T4 from local invasion (T4-invasion). T4-satellite patients were matched 1:4 for sex and histology with resected control patients with stage IA, IB, and IIA non–small cell lung cancer and matched 1:3 with stage II non–small cell lung cancer. Survival and the maximal standardized uptake value on F-18 fluorodeoxyglucose-positron emission tomography scans were compared.
RESULTS: There were 337 patients, 26 patients with T4-satellite lesions, 25 with T4-invasion lesions, and 286 controls (104 patients with T1 N0 M0, 104 with T2 N0 M0, and 78 with T1 N1 M0 or T2 N1 M0 lesions). The two T4 groups were similar for age, race, sex, and neoadjuvant therapy rates. The 5-year survival was 80% for the T1 N0 M0 patients, 68% for T2 N0 M0, 57% for T4-satellite N0 M0, 45% for T1 N1 M0 or T2 N1 M0, and 30% for the T4-invasion N0 M0 patients (p = 0.016). Multivariate analysis showed that only the type of T4 impacted survival (p = 0.011). The median maximal standardized uptake values of the cancers were 4.2 for T1 N0 M0, 4.8 for T4-satellite, 5.4 for T2 N0 M0, 7.8 for T1 N1 M0 or T2 N1 M0, and 8.8 for the T4-invasion patients.
CONCLUSIONS: Larger studies are needed; however, patients with T4-satellite non–small cell lung cancer who undergo complete resection have survival and maximal standardized uptake values similar to patients with stage IB and stage IIA lesions. Their survival is significantly better than those with T4-invasion. Patients with T4-satellite N0 M0 lesions should not be classified as stage IIIB and should not be grouped with patients with T4-invasion, and resection should be considered.
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