SCD and obesity due to melanocortin 4 receptor deficiency: The palmitoleic-16:1n-7/palmitic-16:0 and oleic-18:1n-9/stearic-18:0 ratios that could indirectly indicate enzyme activity of delta-9 desaturase were higher in the OBMS group, consistent with other studies [10,11,12,24] where they have been associated with obesity [10], IR and MetS [12].