Impact on survival without chemotherapy of local treatments of lung metastasis of colorectal cancers: Analysis on REPULCO cohort

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BACKGROUND: The impact of local management of pulmonary metastases on the disease course of patients with metastatic colorectal cancer is poorly assessed. METHODS: REPULCO database was a retrospective cohort on 18 years that included all patients treated for lung metastases from colorectal cancer who received local and/or systemic treatments. AIMS: Primary objective was overall survival, secondary were progression-free survival and survival without chemotherapy. RESULTS: Three hundred and fifteen patients were analyzed, 157 with only systemic treatments, 78 with only local treatments, and 80 with local and systemic treatments. Overall survival at 5 years was 26.9% (IC95%: [17.7-36.9]) for systemic treatments only, 61.0% (IC95%: [40.8-76.1]) for local treatments only, and 77.8% (IC95%: [60.1-88.3]) for local and systemic treatments. Progression-free survival at 2 years was 4.8% (IC95%: [2.1-9.2]) for systemic treatment only, 28.3% (IC95%: [17.7-39.9]) for local treatments only, and 21.8% (IC95%: [13.1-31.9]) for local and systemic treatments. Median survival without chemotherapy was 2.99 months (IC95%: [2.33-3.68]) for systemic treatments, 33.97 months (IC95%: [19.06-NA]) for local treatments, and 12.85 months (IC95%: [8.18-21.06]) for local and systemic treatments. CONCLUSION: Local treatments of lung metastasis led to prolonged survival and allowed long periods of time without chemotherapy in this cohort.

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