title: A newborn with neck mass.
abstract: Congenital goiter is a rare cause of neonatal neck mass and may result from a fetal defectin synthesis of thyroxine, or administration of antithyroid drugs or iodides during pregnancy. The thyroid dysfunction often accompanies it. This report describes a case of a male term newborn with congenital goiter and primary hypothyroidism. Hormonal replacement treatment was started leading to normal levels of free thyroxine and triiodothyronine. In face of a maternal negative investigation, dyshormonogenesis was considered to be the most probable cause of hypothyroidism.
authors.affiliation: Hospital do Espírito Santo, Evora, PT.
authors.forename: Rita Calado
authors.initials: RC
authors.lastname: Pereira
authors.affiliation: Hospital do Espírito Santo, Evora, PT.
authors.forename: Laura Martins
authors.initials: LM
authors.lastname: Barroso
authors.affiliation: Hospital do Espírito Santo, Evora, PT.
authors.forename: Maria José
authors.initials: MJ
authors.lastname: Mendes
authors.affiliation: Hospital do Espírito Santo, Evora, PT.
authors.forename: Isabel Fernandes
authors.initials: IF
authors.lastname: Joaquim
authors.affiliation: Hospital do Espírito Santo, Evora, PT.
authors.forename: Helder
authors.initials: H
authors.lastname: Ornelas