Patient: Description of condition (onset, main symptoms, hospital visited, etc.): Male, 71 years old, previously in good health, found that the shadow treated as pneumonia three years ago had increased significantly during the hospital checkup, and underwent left lung lower lobe resection plus hilar mediastinal lymph node dissection on February 25, 2011. He was treated for pneumonia in 2008. He was treated for pneumonia in 2008 and was not reviewed after a few days of anti-inflammatory drug infusion. But the chief of the thoracic surgery department said: chemotherapy is not effective for adenocarcinoma, surgery is very clean, the old man’s body and spirit are good, the side effects of chemotherapy are not worth the loss, chemotherapy is not recommended, but the chemotherapy department recommends chemotherapy. We didn’t know where to go, so we didn’t treat and came back, but we did a CT and everything was good. 1.Dad has always been in good health, paying attention to health care and exercise, afraid that the side effects of chemotherapy will affect his state, and afraid that metastasis will shrink his life expectancy, what should we do? 2.If chemotherapy is necessary, can we find a chemotherapy drug with high efficiency by using genetic target testing? 3.Irisa test is positive, when was this drug taken? After metastasis or after chemo resistance? We don’t think dad needs palliative care at 70 years old, we want to extend the survival time and improve the quality of life both! Please give us a clear answer!