Serum cortisol was undetectable (cortisol < 1 μg/dL; NR: 7.8–26.2) and plasma ACTH concentrations were within the normal range (22.1 pg/mL; NR: 4.7–48.8) in the presence of documented hypoglycaemia (Table 1). The gene discussed is POMC; the disease is Hypoglycemia.