Mrs. K, a 55-year-old woman, was admitted with recurrent vomiting for the past 5 months and generalized weakness. She had lost significant weight and could no longer perform daily activities. On examination, she was emaciated and had pigmentation on her skin. Tests found low sodium and potassium levels with high renin and aldosterone levels, consistent with adrenal insufficiency. The provisional diagnosis was hypertension and Addison's disease. Further tests were needed to confirm whether the condition was primary or secondary adrenal insufficiency.