title: [Thyroid ectopia, a cause of error in neonatal screening for hypothyroidism].
abstract: The authors report the case of a boy presenting with hypothyroidism due to ectopic thyroid, diagnosed at age 3 years. The results of neonatal screening for hypothyroidism (T4 + TSH) had been normal. A large ectopic thyroid might have been responsible for normal levels of thyroid hormone at birth.
mesh_terms: D002675:Child, Preschool; D002828:Choristoma / Q000151:congenital*; D003409:Congenital Hypothyroidism; D005188:False Negative Reactions; D006801:Humans; D007037:Hypothyroidism / Q000097:blood / Q000175:diagnosis*; D008297:Male; D008403:Mass Screening; D013961:Thyroid Gland / Q000002:abnormalities*
vernacular_title: L'ectopie thyroïdienne, cause d'erreur du dépistage néonatal de l'hypothyroïdie.