MG88, a 23 year old woman with a novel BLK variant (MODY-11) was obese with a BMI of 30kg/m2 similar to earlier reports by Kim et.al., who had noted that there was a higher prevalence of obesity in individuals with diabetes linked to the BLK gene than in diabetic individuals with MODY linked to other loci[25]. Here, BLK is linked to obesity due to melanocortin 4 receptor deficiency.