The word ‘carcinoid’ refers to a type of tumor that arises from neuroendocrine cells, which are cells that have characteristics of both nerve cells and hormone-producing cells. Carcinoid tumors are typically slow-growing and are most commonly found in the gastrointestinal tract, particularly in the appendix and small intestine. They can also occur in other parts of the body, such as the lungs. Carcinoids may secrete hormones that can lead to various symptoms, a condition known as carcinoid syndrome, which may include flushing, diarrhea, and wheezing.
