[Radiofrequency Ablation Pulmonary Metastasis of Colorectal Cancer - Two Cases of Report].

Case 1: 63-year-old woman received abdominoperineal resection with lateral lymph node dissection for rectal cancer in 2008. After adjuvant chemotherapy, she suffered from lung metastasis and received partial pneumonectomy in 2012. However, chemotherapy was performed again for lung metastasis and mediastinal lymph nodes in 2013. Radiofrequency ablation (RFA)was performed to lung metastasis in 2016 due to ineffectiveness of chemotherapy. Case 2: 81-year-old man received Hartmann's procedure for rectal cancer with lung and liver metastasis in 2012. After 6 months of chemotherapy, liver partial resection and pulmonary partial resection were performed. In spite of additional chemotherapy, He received partial pneumonectomy in 2013. In 2014, he restart chemotherapy due to lung metastasis. In 2016, he received RFA for lung metastasis because of ineffectiveness of chemotherapy. After that, he received g-knife for brain metastasis. He is going to receive RFA for another lung metastasis.