The term ‘carcinoid’ refers to a type of slow-growing tumor that typically arises in the neuroendocrine cells, which are found throughout the body, but most commonly in the gastrointestinal tract, lungs, and pancreas. Carcinoid tumors can produce hormones such as serotonin, which can lead to various symptoms and syndromes, such as flushing and diarrhea, when secreted in excessive amounts. The term may also refer to related conditions or features associated with these tumors.
