There is no clear clinical value for how much high ferritin is a tumor at the moment. Ferritin is a complex formed by desferritin and core iron ions, high ferritin may indicate abnormal iron storage in the body, also seen in hepatitis, acute infection, pancreatic cancer, lung cancer, leukemia and other diseases, so elevated ferritin is not necessarily a tumor, it is recommended that patients combine with other examination items and promptly consult a professional doctor for a clear diagnosis: 1. Ferritin has a strong ability to bind iron and store iron in the body. Excessive intake of iron can lead to elevated ferritin and increase of stored iron in the body. Common diseases are hereditary hemochromatosis, increased iron storage in the body due to iron utilization disorders, and secondary iron overload, mostly in patients with long-term blood transfusion; 2. Due to the presence of abnormal symptoms in the body such as infection, tumor or hyperthyroidism, resulting in impaired ferritin clearance and hyper-synthesis, causing increased ferritin synthesis. In addition, there is also a physiological increase in ferritin synthesis, such as athletes with high daily oxygen consumption and correspondingly high ferritin synthesis; 3. In the case of liver cell injury, this can lead to increased ferritin release, commonly in the case of hepatic necrosis and chronic hepatitis, when liver function decreases and is unable to inhibit ferritin synthesis, resulting in elevated ferritin. Since the liver reacts significantly to ferritin, ferritin has diagnostic significance for metastatic tumors in the liver. In addition, the value of ferritin is also affected by gender and age. Mild elevation is usually clinically insignificant, so patients need not be particularly concerned. High ferritin can also be associated with cardiovascular and metabolic diseases, commonly lupus erythematosus and rheumatoid arthritis, etc. Due to the many possibilities, differential diagnosis needs to be made in conjunction with other laboratory tests.