A 47-year-old man is evaluated in hospital following a 2-week history of darkening of his urine. He reports no recent illnesses.
Which of the following is most likely to be seen in this patient?
A) Anti-Hu antibodies
B) Insulin resistance
C) Serum calcium of 12 mg/dL
D) Serum sodium of 125 mEq/L
E) Urinary specific gravity of 1.030
