High tumor marker in blood test and shadow in lungs may be lung cancer or other diseases such as pneumonia, tuberculosis, lung nodule. Generally speaking, if the tumor marker is high and there are shadows on the lungs, it suggests that there is a higher possibility of lung cancer. It is recommended that the patient under the guidance of the doctor should undergo further examination, such as enhanced CT examination, and if the enhanced CT also suggests that there is a possibility of lung cancer, then it is recommended to carry out pathological examination to make it clear. However, high tumor markers and shadows on the lungs do not necessarily mean lung cancer, but may also be pneumonia, tuberculosis, lung nodules and other lesions, which can also cause elevation of tumor markers, and it is not a specific indicator. Therefore, it is necessary to combine with the patient’s own symptoms and signs to make a comprehensive judgment. It is recommended that the patient under the guidance of the doctor for further examination to clarify the cause of the disease, and then actively carry out treatment.