We found that 118 (28%) of the genes shared between diabetes mellitus and obesity were cross-referenced between the two research fields, including many genes that are strongly linked to both diseases such as FTO [12], involved in regulation of global metabolic rate and body fat accumulation, as well as ADIPOQ [13], which is implicated in the control of fat metabolism and insulin sensitivity. This evidence concerns the gene ADIPOQ and obesity due to melanocortin 4 receptor deficiency.