The optimal starting point for survival time in pulmonary metastasectomy

摘要

Aim: Studies of metastatic lung cancer have used various starting points for calculating the survival period, including the time of primary tumor resection and the first and final pulmonary metastasectomy. This study examined differences in prognostic factors according to the starting point used to calculate survival time. Methods: We performed surgical resection of pulmonary metastases in 202 consecutive patients between 1999 and 2013. Of these, 146 (excluding overlapping cases) underwent pulmonary metastasectomy. We examined the survival period after resection in patients with pulmonary metastases (group M) and primary tumors (group P). The prognostic influence of variables on survival was analyzed.