TPO and autoimmune thyroid disease: There were one case of autoimmune thyroiditis (45-year-old woman, anti-TPO positive), one case of Graves' disease (19-year-old woman, anti-TPO positive) and a case of subclinical hypothyroidism (29-year-old man, anti-TPO negative) in the vitiligo group and two patients with Hashimoto thyroiditis (41-year-old woman and 12-year-old boy, both anti-TPO positive), one case of transient thyroiditis (30-year-old man, anti-TPO negative) and one patient with subclinical hypothyroidism (33-year-old man, anti-TPO negative) in the control group.