Generally speaking, cancer cannot be judged by ferritin index alone, and the diagnosis of cancer needs to be combined with the patient’s symptoms and other examination results. Normal adult male serum ferritin ranges from 15 to 200 μg/L, and female serum ferritin ranges from 12 to 150 μg/L. When serum ferritin is elevated, it may be caused by non-cancerous diseases, such as repeated blood transfusions, anemia, chronic hepatitis, etc., or it may be caused by cancers, such as lymphoma, liver, pancreatic, and lung cancers. In addition, many cancers sometimes do not lead to abnormal ferritin indicators. Therefore, serum ferritin index is only one of the factors for making clinical judgment. The diagnosis of cancer often requires a combination of ultrasound, MRI, pathology examination and other examination items, as well as medical history and symptoms. If a patient’s examination reveals abnormal indicators or physical discomfort, it is recommended that he or she go to the hospital in time to make a clear diagnosis and receive standardized treatment.