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. 2015 Feb 27;16(2):419–429. doi: 10.3348/kjr.2015.16.2.419

Fig. 4. Transient hypothyroidism in 1-month-old boy born at 36 weeks and weighing 2440 g.

Fig. 4

Neonatal screening revealed abnormally high thyroid stimulating hormone (TSH) (27.65 µU/mL) and free thyroxine (T4) (1.76 ng/dL; normal range, 0.70-2.0 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.