[Thyroiditis and Turner's syndrome].

Two patients with Turner's syndrome and Hashimoto's thyroiditis are described. The incidence of the karyotype 46 XX (iq), 45 X is high in this association reported in the literature; thus, 17 patients among 25 with Turner's syndrome and thyroiditis had a structural abnormality of the X chromosome. Routine thyroid antibodies determination should be carried out in patients with gonadal dysgenesis between 10 and 20 years of age, and early replacement therapy should be undertaken in Turner's syndrome with Hashimoto's thyroiditis, since clinical signs of hypothyroidism are usually delayed.