The regions showing association with obesity‐related phenotypes are located at 11q11 (OR4P4, OR4S2, OR4C6), 1p21.1 (AMΥ1), 10q11.22 (NPY4R), 10q26.3 (CYP2E1), 16q12.2 (FTO), 16p12.3 (GPRC5b), and 4q25 [82] and have been associated with adult obesity as well [93, 94]. The gene discussed is CYP2E1; the disease is obesity due to melanocortin 4 receptor deficiency.