Carcinoid Tumor Written by NCI Thesaurus v.07.09d   

Definition of Carcinoid Tumor Carcinoid tumor, also known as well differentiated endocrine neoplasm, is a slow growing neuroendocrine tumor, composed of uniform, round, or polygonal cells having monotonous, centrally located nuclei and small nucleoli, infrequent mitoses, and no necrosis. The tumor may show a variety of patterns, such as solid, trabecular, and acinar. electron microscopy shows small secretory granules. Immunohistochemical studies reveal NSE, as well as chromogranin immunoreactivity. malignant histology (cellular pleomorphism, hyperchromatic nuclei, prominent nucleoli, necrosis, and mitoses) can occasionally be seen. Such cases may have an aggressive clinical course. gastrointestinal tract and lung are common sites of involvement. Carcinoid Tumor is from the group Neuroendocrine Neoplasm Other Names for Carcinoid Tumor Carcinoid Tumor Carcinoid Carcinoid Neoplasm Well-Differentiated Endocrine Neoplasm carcinoid Source NCI Thesaurus License

 

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