Whether or not a 9mm vacuolar nodule is important depends on the nature of the nodule. If it is a benign nodule, it usually does not matter, but if it is a malignant nodule, it is more serious. 1. Benign nodules: Vacuolar nodules in the lungs may be pneumonia, tuberculosis, these diseases are benign lesions, during the examination may be found to have the presence of vacuolar nodules, but generally not serious, through timely treatment can be cured. 2. Malignant nodules: for example, lung cancer, belongs to malignant tumor of lung, when the tumor gradually increases, it may be found that there are vacuolated nodules existed, and accompanied by unclear boundary and surrounding burr lobulated, this type of vacuolated nodules will be more serious, and if the treatment is not timely, the life of the patient will be in danger. At present, we need to seek medical treatment as soon as possible, and analyze the nature of the vacuolar nodule, according to the results of targeted treatment, so as not to delay the condition, resulting in the gradual increase of the nodule.