1. Transient hypothyroidism in 1-month-old boy born at 36 weeks and weighing 2440 g. Neonatal screening revealed abnormally high thyroid stimulating hormone (TSH) (27.65 µU/mL) and free thyroxine (T4) (1.76 ng/dL; normal range, ng/dL) levels. A. Transverse ultrasonography scan shows normal thyroid gland. B. Scintigraphy scan obtained on same day shows no visible thyroid activity. C. Follow-up scintigraphy at 1 year shows normal thyroid uptake. TSH and free T4 levels were normal. Patient discontinued levothyroxine treatment.
Fig. 4. Transient hypothyroidism in 1-month-old boy born at 36 weeks and weighing 2440 g. Neonatal screening revealed abnormally high thyroid stimulating hormone (TSH) (27.65 µU/mL) and free thyroxine (T4) (1.76 ng/dL; normal range, ng/dL) levels. A. Transverse ultrasonography scan shows normal thyroid gland. B. Scintigraphy scan obtained on same day . . .
Korean J Radiol Mar-Apr;16(2):