CA724 value of 20 μg/L is serious, but it should be evaluated in conjunction with imaging and pathologic findings. As a tumor-associated glycoprotein, CA724 is commonly found in malignant tumors of the gastrointestinal tract and ovary, and may also be elevated in non-small cell lung cancer, breast cancer, pancreatic cancer, and colorectal cancer. The normal reference value is less than 6.7 μg/L, but exceeding this range does not necessarily mean malignant tumors. Elevated CA724 can also be seen in certain benign diseases such as chronic gastritis and enteritis. If you want to further determine the severity of the disease, you need to carry out imaging and pathologic examination to clarify the nature of the disease. It is recommended to consult a doctor to standardize the diagnosis and treatment if necessary.