Diffuse idiopathic pulmonary neuroendocrine cell hyperplasia (DIPNECH)

Diffuse idiopathic pulmonary neuroendocrine cells hyperplasia (diffuse idiopathic pulmonary neuroendocrine cell hyperplasia: DIPNECH) is a rare pulmonary lesion described and named since 1992.1 It is characterized by a proliferation of neuroendocrine cells in the bronchial mucosa not exceeding the basal membrane. It may be associated with typical carcinoid tumors.2 The WHO classification of pulmonary tumors classifies it among pre-neoplastic lung lesions, with an increased risk of carcinoid tumors.2 We report here a case of a patient with pulmonary neuroendocrine hyperplasia, poorly known because of its low prevalence and non-specific presentation.