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Diffuse Idiopathic Pulmonary Neuroendocrine Cell Hyperplasia: A Case With Long-term Follow-up.

Diffuse idiopathic pulmonary neuroendocrine cell hyperplasia (DIPNECH) is a relatively new disease classification first reported in 1992.1 In the 2015 World Health Organization (WHO) classification, DIPNECH was classified as a type of preinvasive lesion, often accompanied by carcinoid and carcinoid tumorlets.2 Because few DIPNECH cases have been reported, the diagnosis, treatment, and prognosis criteria of DIPNECH have not been established. We report a DIPNECH case with a long-term follow-up, and we review the previous DIPNECH reports.