[Thyroglobulin and thyroid pathology in children].

Thyroglobulin, a marker for thyroid vesicles, is a normal constituent of serum. For the last ten years, thyroglobulin has been routinely assayed using a radioimmunologic double antibody technique. In children, normal values are usually under or equal to 30 ng/ml. Neonates have higher levels. The main indications of thyroglobulin assays in pediatrics include diagnosis of metastases of differentiated thyroid epitheliomas and etiologic diagnosis of congenital hypothyroidism. Thyroglobulin assays are less helpful in the other childhood thyroid diseases (goiter, hyperthyroidism).