Endocrine Abstracts

Diffuse idiopathic pulmonary neuroendocrine cell hyperplasia (DIPNECH) is regarded as a precursor to the development of carcinoid tumorlets. It is confined to the neuroendocrine cell of the airway mucosa without penetration through the basement membrane and appears in a diffuse pattern, typically in association with obliterative bronchiolar fibrosis. DIPNECH belongs to the preinvasive lesions defined by the 1999 World Health Organization classification, along with atypical ade...