The misdiagnosis rate of lung cancer is relatively high, which is mainly caused by atypical early symptoms, atypical imaging examination, and patients’ lack of awareness of consultation. 1. Atypical early symptoms: 5%-15% of patients are asymptomatic, and some of them have slight early symptoms, such as coughing, coughing up sputum, and blood in sputum, but colds, bronchitis and other common diseases have similar symptoms, so they are easily neglected. 2. Atypical imaging examination: even though some patients have received radiological examination, it is difficult to distinguish lung cancer and tuberculosis accurately on chest radiographs. For example, peripheral lung cancer is confused with tuberculosis tumor, and central lung cancer is confused with tuberculosis of hilar lymph nodes. 3. Patients’ low awareness of consultation: Many patients are often found by CT examination only when they have serious symptoms, such as dyspnea or severe peripheral metastatic bone pain, thus losing the best time for treatment. Therefore, patients should be examined as early as possible for early diagnosis and treatment in order to have a better prognosis.