Thyroid hormones are crucial for growth and neurodevelopment during early childhood, with three to five IQ points lost for each month in which hypothyroidism remains untreated in the first year of life (11).This developmentally critical period parallels the proliferative phase of hemangiomas and highlights a window of opportunity to screen for and aggressively treat hypothyroidism in the context of diffuse hepatic hemangiomas. Here, TG is linked to hypothyroidism.