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Pulmonary carcinoid tumour is a neuroendocrine tumour of the lung. [1] ... Lung carcinoids (cancer.org) This page was last edited on 2 October 2023, at 19:53 ...
By definition, they are greater than 4 mm in largest dimension; smaller lesions are referred to as pulmonary carcinoid tumourlets. [citation needed] The differential diagnosis of typical pulmonary carcinoid tumour includes: atypical pulmonary carcinoid tumour, pulmonary carcinoid tumourlet and lung adenocarcinoma. [citation needed]
A carcinoid (also carcinoid tumor) is a slow-growing [1] type of neuroendocrine tumor originating in the cells of the neuroendocrine system. In some cases, metastasis may occur. Carcinoid tumors of the midgut ( jejunum , ileum , appendix , and cecum ) are associated with carcinoid syndrome .
Pulmonary neuroendocrine tumors are neuroendocrine tumors localized to the lung: bronchus or pulmonary parenchyma.. Pulmonary neuroendocrine tumors include a spectrum of tumors from the low-grade typical pulmonary carcinoid tumor and intermediate-grade atypical pulmonary carcinoid tumor to the high-grade pulmonary large cell neuroendocrine carcinoma (LCNEC) and pulmonary small cell carcinoma ...
It is an uncommon low-grade malignant lung mass that is most often in the central airways of the lung. It is also known as "atypical lung carcinoid tumour", " atypical lung carcinoid" or "moderately differentiated neuroendocrine carcinoma". It is a more aggressive than typical carcinoid tumors: nodal metastases in 70% vs. 5%.
In most DIPNECH cases, upon examination of the lung tissue, the overgrowth of pulmonary neuroendocrine cells is seen along the small airways, with extension through the basement membrane of the bronchiolar epithelium leading to formation of carcinoid tumorlets. When the tumorlets become greater than 5mm in size they are considered bronchial ...