Neuroendocrine Tumors of the Gastrointestinal Tract, Lung, and Thymus – Carcinoid Tumors

Carcinoid tumors are rare, slow-growing tumors. Some may be functional neuroendocrine tumors (NETs) of the gastrointestinal system, lungs, or thymus and release hormones or vasoactive substances. These factors cause clinical syndromes characterized by flushing and diarrhea (gastrointestinal) or wheezing and right heart effects (bronchopulmonary). Carcinoid syndromes usually do not occur until tumors metastasize to the liver.

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Content Review: 
March 2017

Last Update: July 2018