Paediatricsmiddle twist
You are the intern in a newborn follow-up clinic. A 9-day-old boy has been recalled because his newborn bloodspot screening result shows a markedly raised thyroid-stimulating hormone. He was born at term, is breastfeeding well and has regained his birth weight. There is no goitre, no umbilical hernia, no prolonged jaundice and his tone and cry are normal. His parents are frightened and want to know what happens now. Which one of the following is the most appropriate management?