Cordate foci in the upper lobe of the lungs may be caused by old lesions, lung infections, lung cancer and other diseases, and patients can choose drug treatment and surgery according to the cause of the disease. 1. Old lesions: traces left after recovery from previous lung diseases, which can be treated without special treatment. 2. Lung infection: when the lungs are infected by bacteria, it may cause cord-like foci in the upper lobe of the lungs. Patients can take antibiotics (e.g. azithromycin, levofloxacin, etc.) under the guidance of doctors, and the foci may disappear after the inflammation subsides, or they may remain as old lesions. 3. Lung cancer: it can also be manifested as upper lobe cord-like foci, if diagnosed, surgery should be chosen as the main comprehensive treatment. If the diagnosis is confirmed, surgery should be the main comprehensive treatment. As there may be other causes of lung cancer, it is recommended to go to a specialized hospital to clarify the cause of the disease and then under the guidance of the doctor for further treatment.