The treatments for lung cancer in the apical posterior segment of the upper lobe of the left lung include radiotherapy, targeted therapy and surgery. 1. Radiotherapy: killing tumor cells through chemical drugs or physical rays. It can be used to eliminate tumor foci and metastatic foci for metastatic lung cancer. Commonly used drugs in chemotherapy are gemcitabine injection and paclitaxel injection. 2. Targeted therapy: Targeted therapy is to kill tumor cells through targeted drugs and reduce the harm to normal cells, commonly used targeted drugs such as gefitinib injection and axitinib injection. 3. Surgery: Surgery is the first choice of treatment in early stage, and generally it can take lesion excision surgery. The therapeutic effect is generally better, improving the survival rate of patients and reducing the occurrence of metastasis. If you are suffering from lung cancer of the posterior segment of the tip of the upper lobe of the left lung, go to a regular hospital as early as possible and choose the suitable treatment method after the doctor’s comprehensive consideration, and do not make judgment on your own, so as to avoid delaying your condition.