Patients bearing autosomal dominant diabetogenic mutations in the INS gene [1, 2] develop a syndrome referred to as Mutant INS gene-induced Diabetes of Youth {MIDY [3–5]; alternative designations include non-autoimmune type 1 diabetes, MODY10 [6, 7] (OMIM #613370), as well as other names [8]}. Here, INS is linked to diabetes mellitus.