The causes of anterior mediastinal nodules are often clinically First, lung infection, most often seen in patients who have been smoking for a long time, can cause anterior mediastinal nodules due to the chronic inflammation that forms in the lungs. In this case, patients can assess the change in size of the anterior mediastinal nodules by regularly reviewing the enhanced CT of the chest. If the nodules do not change significantly, they can be closely monitored. If the size of the anterior mediastinal nodule increases during the recent review, a puncture biopsy can be considered to clarify the nature of the lesion. Second, patients with bronchiectasis may form anterior mediastinal nodules due to the accumulation of large amounts of sputum. Patients can aspirate the sputum from the bronchus through fibrinoscopy and enhance anti-infection treatment to eliminate the anterior mediastinal nodules. Third, patients with malignant lung tumors can induce anterior mediastinal nodules due to tumor cell invasion. Patients need to have the primary tumor removed and the mediastinal nodes cleared as soon as possible. At the same time, postoperative chemotherapy and radiotherapy are combined to kill cancer cells in the body and remove the anterior mediastinal nodes.