Ferritin is the complex formed by desferritin and trivalent iron ions, generally the concentration of normal adult male ferritin is 15-200μg/L and adult female is 12-150μg/L. There are several cases of high ferritin alone: First, it can be seen in patients treated with long-term blood transfusion, such as patients with myelodysplastic syndrome and patients with aplastic anemia, because anemia requires repeated transfusion, the iron in the transfused red blood cells will be released and eventually combine with deferoxin to form ferritin, resulting in high ferritin alone. Second, various infections, inflammation and tumor diseases, because ferritin is also an acute time-phase reactive protein, when the body has infection, inflammation or tumor diseases, there will also be high ferritin.