Monogenic causes of short stature which are associated with a low serum IGF-I level and normal or high GH levels could comprise the defects of GH1 (bioinactive GH), GHSR (ghrelin receptor), GHR (GH receptor), STAT5B, IGF1, and IGFALS (24). Here, IGF1 is linked to short stature due to GHSR deficiency.