The presence of very high titers of antithyroglobulin antibodies and antithyroid peroxidase antibodies is highly suggestive of which disorder?

• A. Pernicious anemia
• B. Hashimoto thyroiditis
• C. Multinodular goiter
• D. Thyroid adenoma

Answer: (B)

Elevated autoantibodies against thyroid components point to autoimmune attack on the gland. In Hashimoto thyroiditis, the immune system produces high levels of antibodies to thyroid peroxidase and thyroglobulin, reflecting autoimmune destruction of thyroid tissue. This pattern is strongly associated with Hashimoto’s and helps distinguish it from other thyroid issues. Pernicious anemia is autoimmune but targets gastric factors (like intrinsic factor or parietal cells), not thyroid proteins, so its antibody profile wouldn’t center on TgAb and TPOAb. Structural thyroid problems such as multinodular goiter or a thyroid adenoma don’t inherently involve autoimmune antibodies to thyroid proteins.