In fact, it is incorrect to say that ca724 is the most unreliable, it just means that there is no way to diagnose cancer by ca724 alone. ca724 is also known as tumor marker, it is a glycoprotein antigen, can be used for the diagnosis and screening of gastrointestinal tract, ovary and other malignant tumors, such as the emergence of obvious elevation, especially more than 3 times the normal range, it is likely to be caused by cancer, but can not be used as the final basis for the diagnosis of cancer, so it is considered not very reliable. Generally, after the ca724 several times higher, you need to timely abdominal CT, gastroenteroscopy or MRI, pathological tissue biopsy, etc., in order to more accurately investigate the specific causes of the disease, to determine whether it is benign or cancer, so as to take targeted treatment. If it is caused by cancer, it needs to be treated through surgery, radiotherapy, chemotherapy and other means. The reference significance of ca724 is still good, but it can only be used as an auxiliary diagnosis, it is recommended to follow the doctor’s guidance to improve other tests.