IGF1 and obesity due to melanocortin 4 receptor deficiency: Over the last decade, height, which is an easily measured anthropometric measurement, has been firmly established as a significant risk factor for various cancer types in addition to obesity.6,7 Biological findings that increased insulin-like growth factors (IGF) were measured in taller population groups and it was determined that IGF could facilitate tumor cell growth, which has supported this epidemiological association.8