A 78-year-old man is brought to the emergency department by his neighbor because of a 3-week history of severe weakness

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A 78-year-old man is brought to the emergency department by his neighbor because of a 3-week history of severe weakness and fatigue; he also has had a 7.3-kg (16-lb) weight loss during this period. He lives alone, and he says that his daughter usually visits him once or twice weekly to bring him groceries. However, he has eaten nothing but small quantities of saltine crackers and black coffee since his daughter left for vacation 1 month ago. He is 173 cm (5 ft 8 in) tall and now weighs 56 kg (124 lb); BMI is 19 kg/m2. His pulse is 92/min, and blood pressure is 108/76 mm Hg Physical examination shows generalized muscle weakness. Serum studies in this patient are most likely to show an increased concentraiion of which of the following hormones?


0 A) Cortisol
0 B) Insulin
0 C) Insulin-like growth factor-I
D) Testosterone
E) Triiodothyronine (TJ)