What is Carcinoid Syndrome?
Carcinoid Syndrome is caused by carcinoid tumors that most commonly arise in the mucosa of the gastrointestinal tract. Carcinoid syndrome is the set of symptoms that may occur in patients who have carcinoid tumors. Not all people with carcinoid tumors have carcinoid syndrome. The syndrome occurs when carcinoid tumors overproduce substances such as serotonin that normally circulate throughout your body. This overproduction of serotonin and other hormones is what causes the