CA724 higher than 300 (U/ml) is not necessarily cancer, but the elevated value is too high, the possibility of malignant tumors is high, it is recommended to consult the doctor as soon as possible to clarify the cause. CA724 is a non-specific tumor marker. Normal value is 0-6.7U/ml, which is mostly seen in gastrointestinal and ovarian tumors, but also in bile duct cancer, pancreatic cancer, liver cancer, etc. Elevated CA724 can also be seen in bile duct cancer, pancreatic cancer and liver cancer. Elevated CA724 can also be seen in chronic gastric diseases and other chronic diseases of the digestive tract, such as gastritis, acute pancreatitis, cholecystitis and so on. Non-disease causes can also lead to elevated CA724, such as in women during pregnancy and menstruation, as well as alcohol consumption, sleep deprivation, and the consumption of supplements. Elevated tumor markers can only assist in the diagnosis of the disease, and cannot confirm the diagnosis of cancer based on the elevation of a single indicator. It is recommended that patients undergo further endoscopy, ultrasound, CT and other imaging tests to clarify the nature of the disease.