ABSTRACT
Neuroendocrine tumors are derived from neuroendocrine cells which are commonly found in gastrointestinal system. Neuroendocrine cells take the electrical signals from the nervous system, convert them into hormonal signals with production of hormones, peptides and amines. As neuroendocrine cells are ubiquitous in our body, but NETs usually locates in the gastrointestinal (55%) or in the bronchopulmonary system (25%). The incidence and prevalence of NETs have been increasing over the years possibly due to increased awareness, and widespread use of endoscopy and imaging studies for various gastrointestinal diseases.
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