A 71-year-old female with no significant past medical history presents to your office complaining that her friends have noticed a slight yellowing of her skin over the past month. She denies any abdominal pain, but reports a recent 15-lb weight loss as well as persistent "itching all over." On physical exam, you palpate a large, round cystic mass in right upper quadrant which you think may be her gallbladder. Which of the following serum markers is likely to be abnormally elevated given the most likely diagnosis?
A. CA-125
B. CEA
C. CA-19-9
D. AFP
E. Beta HCG
A. CA-125
B. CEA
C. CA-19-9
D. AFP
E. Beta HCG