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Old 05-18-2014
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Question Urine 5-HIAA

Which of the following can increase (urine 5-HIAA)?
Carcinoid tumor (localized), or Carcinoid syndrome (extraintestinal mets -liver mets- of carcinoid tumor)?
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Old 05-18-2014
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Default Explanation

Both. Bcoz the difference between them is that tumor may or not produce symo whereas syndrome does bcoz of active serotonin. But serotonin gets degraded in both so 5hiaa is present in both
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