Lung nodules treatment depends on the size, type, and cause of the nodules. If a nodule is benign, treatment may not be necessary, but doctors will monitor it regularly through imaging tests. For malignant or suspicious nodules, treatment options include surgery to remove the nodule, radiation therapy, and chemotherapy, depending on the cancer's stage. Biopsy is often performed to determine whether a nodule is cancerous. In some cases, targeted therapy or immunotherapy may be used. The approach is individualized, based on the nodule's characteristics and the patient's overall health.