INS and Hypoglycemia: He was diagnosed with CHI based on profound hypoglycemia of BS 19 mg/dL (SI: 1.05 mmol/L) [reference range, 70-109 mg/dL (SI: 3.9-6.1 mmol/L)] with nonsuppressed insulin level: the ratio of immunoreactive insulin (μIU/mL) to BS (mg/dL) was 2.2.