Neuroendocrine tumors (NETs) are a heterogeneous group of neoplasms originating from endocrine cells. which are characterized by the presence of secretory granules as well as the ability to produce biogenic amines and polypeptide hormones. These tumors originate from endocrine glands such as the adrenal medulla. the pituitary. https://www.marcelovicente.com/product-category/4n-84n-light-neutral-brown/