Lung nodules over 8mm may be caused by atypical adenomatous hyperplasia, or by lung infections, misshapen tumors, and so on. If the lung nodule is above 8mm, it may be caused by atypical adenomatous hyperplasia, which is a more common kind of hyperplasia, caused by more diverse reasons, such as smoking, family history, etc., and the general nature of the malignant is more, and need to be timely for fiberoptic bronchoscopy biopsy and other tests. However, it cannot be directly defined as atypical adenomatous hyperplasia without examination. It may also be caused by other reasons, such as lung infection, misshapen tumors, etc., which can also lead to the production of lung nodules of more than 8mm, so the final tissue biopsy results shall prevail, which is the gold standard for the diagnosis of the nature of lung nodules. Lung nodules of 8mm or more require prompt medical attention and treatment as prescribed by the doctor.