Stage 1a2 Invasive Lung Adenocarcinoma Genetic Testing is used for precise treatment by pathologically examining the patient’s cancerous tissues and identifying the target sites where the patient’s gene mutations occur. Gene mutations play an important role in the process of cancer development, and it is known that many genes are involved in the formation of lung cancer cells to varying degrees. Genetic testing can clarify the mutated gene loci of lung cancer patients through special testing of their pathological tissues and guide clinicians to carry out precise treatment. Common gene mutations in lung cancer include EGFR gene, ALK gene, MET, ROS1 gene, BRAF gene, HER2 gene and so on. Different drugs can be selected according to different gene mutations. Genetic testing for lung cancer patients should be operated by professional oncologists, and patients are recommended to go to regular hospitals.