This attracted our interest, since we recently published a literature review in which we reported that CH is found in a broad spectrum of hyperinsulinemic diseases, including maternal diabetes mellitus, malformation syndromes with insulin resistence (of which Costello, Beckwith–Wiedemann, Leprechaunism, congenital generalized lipodystrophy) and congenital hyperinsulinism3. Here, INS is linked to Leprechaunism.