Color Doppler imaging of the thyroid gland in a fetus with congenital goiter: a case report.

Fetal goiter is a rare disorder, usually associated with maternal thyroid disease. Antenatal diagnosis of fetal goiter is crucial for the immediate postpartum management of these neonates. A case report is presented of an antenatally diagnosed fetal goiter induced by antithyroid medications. Color Doppler was used to demonstrate a high flow pattern that, unlike in the adult goiter, was associated with hypothyroidism in the neonate. A scan of fetal neck region is recommended in patients with current or previous history of thyroid disease, or if neck extension is noted on routine examination of fetal spine.