Hashimoto’s thyroiditis (HT), also named chronic lymphocytic thyroiditis, is a clinical, organ-specific autoimmune disease characterized by lymphocytic infiltration of the thyroid parenchyma, diffusely enlarged thyroid gland and elevated production of autoantibodies, mainly including anti-thyroglobulin antibody (TgAb) and thyroperoxidase antibody (TPOAb)1, 2. Here, TPO is linked to hematocrit.