OBJECTIVE: The objective of the study was to describe the imaging appearances of diffuse idiopathic pulmonary neuroendocrine cell hyperplasia (DIPNECH) on computed tomography (CT). MATERIALS AND METHODS: Electronic medical records were searched for patients with pathology-proven DIPNECH who had a CT available for review. Eleven patients were included. RESULTS: The most common finding on CT was small pulmonary nodules which were present in all patients and were multiple (≥5) in 7/11 patients. Other CT findings included mosaic pattern attenuation and bronchial wall thickening/bronchiectasis. CONCLUSION: DIPNECH should be considered as a diagnostic possibility when multiple small pulmonary nodules are identified on CT, particularly if there is an associated carcinoid tumor.
