Obesity often co-occurs with GSD II, MWS, HCP, chromosomal aberration 46XX, del (12) (q24.21q24.23) (N% = 100%, ASR = 2.8) and z DMD (N% = 42.9%, ASR = 2.7), but rarely with CP (N% = 8.8%, ASR = −2.4). This evidence concerns the gene CP and obesity due to melanocortin 4 receptor deficiency.