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Serum Metanephrine Test, 5Hiaa, And Chromogranin A


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my dr did labs and 24 hr urine for serum metanephrine test, 5HIAA, and Chromogranin A. i take a bete blocker, could this make my test inaccurate. i know not to drink caffeine and eat certain foods. i was given no instructions what and what not to eat, so i looked it up. what can these labs show besides carcinoid and pheochromocytomas?

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