Diffuse idiopathic pulmonary neuroendocrine cell hyperplasia (DIPNECH) is a rare disorder and information on this disease is limited, especially with regard to its management and prognosis. It has become generally accepted that DIPNECH is a precursor lesion to pulmonary carcinoid tumors.

The majority of patients are older women who present with symptoms of asthma, cough or dyspnea.

Mosaic attenuation is due to associated constrictive bronchiolitis.