5-HIAA (5-HYDROXY INDOLE ACETIC ACID), 24- HOUR URINE

What this test checks

Tests for carcinoid tumour marker.

Why do people get this test?

Used in suspected carcinoid syndrome.

When you should consider this test

• Flushing with diarrhea
• Suspected carcinoid

How to prepare

24-hour urine. Avoid bananas, pineapples, walnuts, kiwi for 24 hours.