Two patients were diagnosed with neonatal DM, one with a transient form caused by paternal uniparental disomy of 6q24 and the other with a permanent form with a heterozygous mutation (c.602G > A [p.R201H]) in KCNJ11, leading to developmental delay, epilepsy, and neonatal diabetes (DEND) syndrome [20]. This evidence concerns the gene KCNJ11 and diabetes mellitus.