20th July 2023

A 62-year-old man has been referred to gastroenterology outpatient clinic with a 2-year history of loose stools

A 62-year-old man has been referred to gastroenterology outpatient clinic with a 2-year history of loose stools, intermittent flushing affecting his face and upper chest for 6 months and new onset wheeze over the last 2 weeks. He has no past medical history and takes no regular prescribed or over-the-counter medications. Clinical examination is unremarkable. His gastroenterologist is worried about a neuroendocrine neoplasm of the GI tract. He arranges a 24-hour 5-hydroxyindoleacetic acid (5HIAA) test and provides him with an information leaflet about the procedure.

To reduce the risk of a false positive result, which of the following foods should he avoid prior to this test?

Select the SINGLE most appropriate option from the list below. Select ONE option only.