Other causes of syndromic obesity include Cohen syndrome, Alström syndrome, X fragile syndrome, Borjeson–Forssman–Lehmann syndrome, 16p11.2 deletion syndrome, kinase suppressor of Ras2 (KSR2) variants, TUB mutations, ACP1, TMEM18, and MYT1L deletion [49]. This evidence concerns the gene KSR2 and obesity due to melanocortin 4 receptor deficiency.