Carcinoma in situ of the lung is a kind of early stage lung cancer, and because it is very early, it rarely invades the surrounding tissues, so most of them do not metastasize and rarely recur. The main treatment for such tumors is radical treatment, and after radical treatment more than 95% of patients have a five-year survival rate of more than 95%, and the overall patient prognosis is very good. However, regular review and further examination are also required. Because of the special concept of carcinoma in situ, the disease was excluded from the scope of serious diseases in 2007. For carcinoma in situ of the lung, early detection and surgical resection is very important, and no radiotherapy or chemotherapy is needed in the follow-up. Therefore, if you have carcinoma in situ, if you treat it actively, your prognosis will be very good, so don’t worry. It is very important for patients to maintain a positive attitude, and cancer is not incurable.