We have investigated cases where pulmonary metastasis from colorectal cancer was resected during the last 15 years, comparing a group with liver metastasis [LM (+)] to a group without liver metastasis [LM (-)]. The following are the characteristics of the LM (+) versus LM (-) groups. Gender: male 6, female 5 versus male 9, female 11, age: 61.4+/-11.4 versus 63.9+/-9.4 years, number of lung metastasis: 1.42 versus 1.29, duration of primary-lung metastasis: 1.59+/-1.02 versus 2.55+/-1.46 years, preoperative CEA: 69.3+/-71.1 versus 8.64+/-5.63 ng/ml, ratio of bilateral lung metastasis: 23.0 versus 4.8%, more than 1 ratio of pulmonary metastasis: 38 versus 19%, complete resection ratio of pulmonary metastasis: 84.6 versus 100%, ratio of thoracoscopic surgery: 69.2 versus 66.7%, and 2-year survival ratio: 63 versus 78%. There were no statistically significant differences in these values between the LM (+) and LM (-) group. A larger number of cases and follow-up duration will be required in the future; we think that the resection of pulmonary metastasis from colorectal cancer with liver metastasis can be supported for the present.
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