Typical blood glucose values are from 3.8 to 5.5 mmol/L, and insulin from 2.6 to 24.9 μU/mL [4,5,6] In the case of insulin values at 0 min being greater than 15 μU/mL and insulin values after an oral glucose tolerance test (OGTT) being greater than 75 μU/mL at 120 min, the value of total insulin is more significant than 300 μU/mL, and hyperinsulinemia is diagnosed [7]. The gene discussed is INS; the disease is hyperinsulinism.