Carcinoid Syndrome Symptoms
5. Diarrhea
Diarrhea is one of those conditions that is unpleasant, yet also quite common. In carcinoid syndrome, it appears to be caused by the tumor’s excessive hormone production, specifically of an important chemical (neurotransmitter) known as serotonin. Excess serotonin in the body, will likely increase gut motility, and augment fluid secretion (i.e. mucus). Nonetheless, many patients may not experience this symptom, even if the tumor does produce these substances.
In carcinoid syndrome, watery diarrhea is fairly common. It is usually very frequent, (i.e. 20 episodes per day) and debilitating. Also, this symptom continues with fasting and it is frequently accompanied by abdominal cramping and flushing of the skin. Complications of severe diarrhea in carcinoid syndrome include dehydration, electrolyte imbalances, and malabsorption.
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