Non-small cell lung cancer antigen generally refers to non-small cell lung cancer-associated antigen, which is elevated at 7.24 ng/L and may be the result of benign diseases such as pneumonia and mastitis, or the presence of malignant tumors such as lung cancer. Non-small cell lung cancer-associated antigen, also known as cytokeratin 19 fragment, CYFRA21-1, has a normal value range of 0 to 3.3 ng/ml. CYFRA21-1 is found in a variety of epithelium-rich organs, such as the breast, lungs, and bladder. Elevated CYFRA21-1 can be seen in benign diseases, such as mastitis, pneumonia, tuberculosis, cystitis, etc. Generally, the CYFRA21-1 value is only mildly elevated, not more than 10 ng/ml.Elevated CYFRA21-1 can also be seen in malignant diseases such as lung non-small-cell lung carcinoma, breast cancer, intestinal cancer, etc., and the CYFRA21-1 value is generally elevated more. Elevated non-small cell lung cancer-related antigen 7.24nml is a mild elevation, which may be caused by benign diseases, and does not exclude the possibility of the presence of lung non-small cell lung cancer and other malignant tumors. It is recommended that the patient should consult the doctor in time and follow the doctor’s instructions for further examination to detect the presence of malignant tumors and active treatment.