Lung 8mm×9mm nodule can be enhanced CT examination first, and then a comprehensive assessment, benign can be checked regularly, can not rule out malignant tumors need surgical resection. Lung 8mm×9mm nodule is usually inflammation, tuberculosis, tumor, etc., you can first do enhanced CT, and then according to the usual symptoms for a comprehensive assessment, if the assessment of benign may be large, no obvious abnormalities, you can first observe, and go to the hospital regularly to review the chest CT. If the assessment cannot exclude malignant tumor, surgical resection is needed, followed by pathological tests, and according to the results of the tests, radiotherapy and other appropriate treatments will be carried out. It is recommended to go to the hospital for a detailed examination and treatment under the guidance of the doctor, and follow the doctor’s instructions.