The tpo in the five items of thyroid function should be TPOAb, its full name is anti-thyroid peroxidase antibody, the normal value is usually less than 60 IU/ml or negative, the reference range of different laboratories may have slight differences. The normal adult reference value for TPOAb is less than 60 IU/ml, which varies slightly from hospital to hospital due to differences in testing reagents. Some hospitals are negative within the normal range and positive is abnormal. Abnormal TPOAb is mostly seen in thyroid diseases, such as Hashimoto’s thyroiditis, hyperthyroidism (including the hyperthyroid phase of Hashimoto’s thyroiditis), and primary hypothyroidism. In addition, a small number of patients with subacute thyroiditis and thyroid cancer may also have elevated TPOAb. However, elevated TPOAb does not confirm the type of disease and needs to be combined with other tests, such as thyroid function, thyroid ultrasound, thyroid puncture biopsy, etc., for further diagnosis. When you find elevated TPOAb or have uncomfortable symptoms, it is recommended that you seek prompt medical attention from a medical professional who will take into account your individual situation to avoid delaying your condition.