Left upper lobe apical posterior segment glass nodule is a description of lung CT for lung lesions, the specific treatment plan is mainly combined with the cause of the disease to formulate, common causes include lung inflammation, tuberculosis, immune system diseases and lung tumors, etc., the treatment plan includes anti-infective treatment, anti-tuberculosis treatment, hormone therapy and surgical resection, etc.. 1. Inflammation in the lungs: Bacterial infection will lead to inflammation in the lungs, which can be controlled by antibiotics, commonly used drugs include moxifloxacin. 2. Tuberculosis: caused by Mycobacterium tuberculosis infection, accompanied by low-grade fever, night sweats and other symptoms, you can choose to apply anti-tuberculosis drugs to control, commonly used drugs are isoniazid, rifampicin and so on. 3. Immune system diseases: if you have immune system diseases, interstitial lesions in the lungs will appear, resulting in ground glass nodules and corresponding conditions, you can apply hormonal drugs, such as hydrocortisone, and so on. 4. Tumor: Early tumors in the lungs will also have corresponding changes, through the review found to have enlarged or solid changes, and further puncture biopsy found to be malignant lesions, which can be radically resected through surgery. Ground-glass nodule in the apical posterior segment of the upper lobe of the left lung, which appears to be enlarged in the process of review, needs to consult a doctor in time for observation and diagnosis of the specific cause of the disease, and then do the standardized treatment, and do not blindly use drugs on your own.