POMC and Hyponatremia: Laboratory examinations showed results of hyponatremia (107 mmol/L, reference range (RR): 136–145 mmol/L), elevated adrenocorticotropic hormone (785 pg/mL, RR: 0–46 pg/mL), and suppressed morning plasma cortisol (1.2 μg/dL, RR: 3.7–19.4 μg/dL).