Endocrine Abstracts

Background: 5-Hydroxyindoleacetic acid (5-HIAA) is the main metabolite of serotonin and is measured in all patients newly diagnosed with neuroendocrine tumours both to diagnose carcinoid syndrome and to monitor treatment response for those with an elevated baseline level. Each test requires patients to avoid certain foods and collect urine over a 24 hour period. It is not known to what extent patients adhere to these requirements or find them burdensome. There...