Moderate
Argentaffinoma is characterized by excess excretion of_____________?
Correct answer: A. 5- Hydroxy indole acetate
- A. 5- Hydroxy indole acetate
- B. 3- Hydroxy phenyl pyruvate
- C. Phenyl lactate
- D. Phenyl acetate
Explanation
Argentaffinoma, commonly associated with a serotonin-secreting carcinoid tumour, produces excess serotonin that is metabolised to 5-hydroxyindoleacetic acid (5-HIAA). Increased urinary 5-HIAA is therefore a useful marker.
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