Lung-rads4b nodules are generally suspicious for malignant nodules, which are more serious and require further investigations. Lung-rads classification is a way of categorizing the benign and malignant potential of lung nodules, the higher the grade, the higher the likelihood of malignancy of the nodule.Lung-rads4 lung nodules can be classified into 4 categories, of which 1-2 are generally benign nodules, 3 are nodules with a higher probability of being benign, and 4 are divided into 4a with low risk of malignancy, 4b with high likelihood of in-situ carcinoma or small invasive carcinoma, and 4x with high likelihood of malignancy. high likelihood. Currently, the status is lung-rads category 4b, and the corresponding nodule has the risk of carcinoma in situ or minimally invasive carcinoma, which is a more serious condition. Further puncture biopsy is needed to determine the type of pathology and surgical resection if necessary. It is recommended that patients with lung-rads4b nodules should go to regular hospitals for timely consultation and professional advice.