Colorectal cancer lung metastasis: Could multidisciplinary management suggest the right strategy?
e15039 Background: Unlike liver metastases surgery, the resection of colorectal cancer lung metastasis (CCLM) is not standardized and data are still poor. Therefore, we conducted a retrospective analysis to evaluate the management of CCLM at our Centre. Methods: We retrospectively analyzed patients (pts) with CCLM treated at our Institution from Jan-2007 to Jan-2017. Aim of the study was to evaluate the impact of clinical and pathological features with survival outcomes (DFS and OS). Differences were compared with the use of log-rank test and parameters considered statistically significant ( p value < 0.5) at univariate were compared at multivariate analysis. Results: 141 pts were included in the analysis. 87 pts received a preoperative chemotherapy (pCT) and 54 an adjuvant (a)CT. In the whole population median DFS (mDFS) was 24 m (20-24) and median OS (mOS) 54 m (46-82), while 21 m (20-34) and 65 m (45-108) for pts undergoing pCT and 15 m (20-28) and 53 m (38 – 76) for those receiving aCT respectively, without statistically significant differences (p=0.4). Age, gender, PS, disease-free interval (DFI) (> or <24 months), primary tumor sidedness, mucinous histology, grading, RAS status, timing of lung metastasis (metachronous vs synchronous), number of lesions (>2), metastasis location (uni vs bilateral) and liver resection were evaluated at univariate and multivariate analysis. DFS was correlated with DFI > 24m (p=0.02), timing (p=0.03), number (p<0,0001) of metastasis and metastasis location (p=0.01) whereas OS was associated to DFI (p=0.02), number (p=0.0005), metastasis location (p=0.037) and RAS status (p=0.05) at univariate. At multivariate analysis, number of lesions correlated to DFS (p=0.0006) while DFI (p=0.0034) and RAS status (p=0.05) to OS. Conclusions: Our single Centre retrospective experience suggests an important clinical impact from surgery of CCLM based on mOS of the whole population. These data strengthen the role of a multidisciplinary management to allow pts to achieve surgery whenever possible, regardless of previous liver surgery, metachronous vs synchronous metastasis, DFI and RAS status.