Published in:
01-03-2016 | Thoracic Oncology
Benefit of Adjuvant Chemotherapy After Curative Resection of Lung Metastasis in Colorectal Cancer
Authors:
Hyung Soon Park, MD, Minkyu Jung, MD, Sang Joon Shin, MD, PhD, Su Jin Heo, MD, Chang Gon Kim, MD, Min Goo Lee, MD, PhD, Seung Hoon Beom, MD, Chang Young Lee, MD, Jin Gu Lee, MD, PhD, Dae Joon Kim, MD, Joong Bae Ahn, MD, PhD
Published in:
Annals of Surgical Oncology
|
Issue 3/2016
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Abstract
Background
The survival benefit of adjuvant chemotherapy after colorectal cancer (CRC) lung metastasectomy is uncertain.
Methods
We enrolled 221 CRC patients who underwent pulmonary metastasectomy between October 2002 and July 2013, including those with previous liver metastasis that had been curatively resected. Disease-free survival (DFS) and overall survival (OS) were calculated from the day of lung metastasectomy.
Results
Among all patients, 176 (79.6 %) received adjuvant chemotherapy after lung metastasectomy. Median follow-up was 34.7 months from the time of lung metastasectomy [95 % confidence interval (95 % CI), 7.4–90.9 months]. Patients treated with adjuvant chemotherapy had longer DFS compared with surgery alone (median 32.7 vs 11.2 months respectively, P = 0.076). Multivariate analysis revealed previous liver metastasis, preoperative carcinoembryonic antigen ≥5 ng/mL, disease-free interval <24 months, and surgery without adjuvant chemotherapy as independent risk factors for recurrence. Low-risk patients who had 0–1 risk factors received a significant survival benefit from adjuvant chemotherapy [hazard ratio (HR) 0.54; 95 % CI 0.32–0.91, P = 0.020]; however, high-risk patients with ≥2 risk factors did not (HR 1.02; 95 % CI 0.48–2.14, P = 0.964). Patients treated with adjuvant chemotherapy showed no OS benefit compared with patients who received surgery alone (median 89.6 vs 86.8 months respectively, P = 0.833).
Conclusions
CRC patients received lung metastasectomy could have a DFS benefit from adjuvant chemotherapy, especially in low-risk patients. Larger, prospective studies are needed to evaluate the role of adjuvant chemotherapy after CRC lung metastasectomy.