However, subsequent blood tests revealed significantly elevated thyroid autoantibodies, including anti-thyroglobulin (201 UI/ml; Normal Value <60 UI/ml), anti-thyroperoxidase (>6,500 UI/ml; Normal Value <60 UI 7 ml), and abnormal levels of thyroid hormones: FT4 of 0.56 ng/dl, and TSH of 12.65 uUI/ml, consistent with an autoimmune etiology and hypothyroidism following treatment with I-131. The gene discussed is TG; the disease is hypothyroidism.