201. Sheetal, 39-yrs-old presents with chronic abdominal cramps, watery diarrhea, and periodic facial flushing. Examination reveals wheezing and a slightly enlarged liver. Work up reveals several masses within the liver and a large mass in the small intestine. Which of the following substances is likely to be elevated in her urine?
5-HIAA Aminolevulinic acid (ALA) FIGLU Norepinephrine