FGD type 2 (OMIM*609196) describes a group of patients with normal MC2R but with mutation in the melanocortin 2 receptor accessory protein (MRAP) which is required for MC2R trafficking and function7 and this accounts for ∼20% of FGD and is now known as FGD type 2.8 The gene discussed is MC2R; the disease is Aarskog-Scott syndrome, X-linked.