What is it?

Carcinoid syndrome occurs when a rare, neuroendocrine cancer called carcinoid tumor secrets chemicals such as hormones into the bloodstream. It is most likely to grow in the lungs or the gastrointestinal tracts. Not all carcinoid tumors cause carcinoid syndrome, as the liver usually neutralizes the chemicals that are produced, before causing any symptoms.

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Signs & symptoms

Symptoms of carcinoid syndrome depend on the kind of chemical that is released by the tumor. It may include skin flushing, skin lesions on the face, diarrhea, difficulty breathing or rapid heartbeat.


Carcinoid syndrome diagnosis is done usually after ruling out several other conditions. This condition may be confirmed in urine, blood and imaging tests.


Carcinoid syndrome treatment is done by treating the tumor itself and the symptoms caused by the chemicals. Treatment may include surgery, medications, radiations, stopping blood supply to tumors by embolization of blood vessels, cryotherapy and chemotherapy.

☝️ This is not a substitute for professional medical advice. Please consult with your physician before making any medical decision.

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