Lung nodules 14mm is already very large, there is a possibility of malignancy, the probability is more than 10%, but how much is based on the specific circumstances of the patient, imaging comprehensive judgment. If the lung is found to be a 14mm nodule, you must go to a respiratory specialist or oncology specialist for further examination, check the tumor series, bronchoscopy or CT-guided puncture biopsy, to clarify the nature of the lung nodule, you can also check PET-CT to determine the nature of the nodule. The nature of the nodule is judged mainly according to the patient’s condition and the nodule’s situation. If the patient is older than 45 years old, has a history of smoking, has a family history of tumor or a previous history of tumor, and the morphology of the nodule suggests a peripheral burr, lobulation or pleural pull, and the nodule is ground glass, the nodule may be malignant.