The other patient with Pearson syndrome also experienced recurrent episodes of hyponatremia, hypokalemia, and hypoglycemia, with blood tests revealing ACTH and cortisol levels of 312 pg/mL and 15 μg/dL, respectively, at the age of 2.6 years, necessitating hydrocortisone treatment. The gene discussed is POMC; the disease is Pearson syndrome.