IGF1 and isolated hemihyperplasia: Four of 5 (80%) patients with IH had reductions in IGF-1-SD (median % change −323% [range −1455-133%], median absolute change [IQR] −0.6 [−1.7-−0.3]) and 6/6 (100%) patients with CNFTs had reductions in IGF-1 SD (median change −333% [range −750-100%], median absolute change [IQR] −1.35 [−2.4-−0.3]).