ESPE Yearbook of Paediatric Endocrinology

Brief summary: Current guidelines for congenital hypothyroidism recommend a starting dose of 10–15 μg/d of levothyroxine for optimal treatment (1). Over the last years, some studies suggested that overtreatment of patients during infancy by high levothyroxine doses might have negative effects on neurocognitive and behavioral development (2). The presented multicenter prospective randomized trial aimed at comparing the effect of higher (12.5–15.0 μg/d levoth...