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A best evidence topic in thoracic surgery was written according to a structured protocol. The question addressed was: Is lobectomy superior to sublobar resection (SLR) for early-stage (cT1/2N0) small-cell lung cancer (SCLC) discovered intraoperatively? Altogether, more than 360 papers were found using the reported search, of which 10 represented the best evidence to answer the clinical question. The authors, journal, date and country of publication, patient group studied, study type, relevant outcomes and results of these papers are tabulated. Surgical treatment was shown to be superior to non-surgical treatment for early-stage SCLC in 8 papers. Seven papers showed that among patients treated surgically, lobectomy is associated with improved survival compared to SLR. One paper demonstrated both improved survival and improved freedom from local recurrence. However, 1 paper showed no difference when lobectomy was compared to anatomical segmentectomy. Three papers demonstrated significant rates of upstaging in surgical patients. Although both lobectomy and SLR are associated with improved survival compared with non-surgical treatment in early-stage SCLC, lobectomy is superior. Lobectomy was associated with improved median and overall survival, better upstaging and decreased local recurrence compared to SLR, although there is potential for selection bias and stage migration. Lobectomy should be considered the optimal approach for patients with early-stage SCLC.

Is lobectomy superior to sublobar resection for early-stage small-cell lung cancer discovered intraoperatively?