5mm atypical adenomatous hyperplasia nodule in lungs is a precancerous lesion in lungs, which is mainly treated by daily care and surgical resection. If the lesion is relatively small, regular observation can be paid attention to first, avoiding excessive exposure to dust and cold air in daily life, and paying special attention to smoking cessation; some patients are more worried about their condition, and they can undergo surgical resection to avoid malignant transformation of the cells afterward. Clinical review process found that the corresponding lung nodules continue to increase in size, you need to consult a doctor in time for observation, if necessary, can be puncture biopsy of the lesion, after diagnosis of the lesion, under the guidance of the clinician to carry out standardized treatment, to avoid delays in the condition.