[Diffuse idiopathic pulmonary neuroendocrine cell hyperplasia with tumorlet formation: A case report and review of the literature].

Diffuse idiopathic pulmonary neuroendocrine cell hyperplasia is an infrequent lesion recently classified by the WHO as preinvasive. It can present with the formation of tumorlets (neuroendocrine cell groups up to 5 mm) which result in a typical histological and radiological image. We report a case of a 67-year-old women who presented with a chronic cough. The CT scan showed bilateral minute, multiple pulmonary nodules. A biopsy revealed a diffuse idiopathic pulmonary neuroendocrine cell hyperplasia with several tumorlets. After two years of follow-up, imaging studies showed no significant changes.