Chest computed tomography (CT) scan features at the time of diffuse idiopathic pulmonary neuroendocrine cell hyperplasia diagnosis (n=44)
| Bilateral nodules | 42 (95) |
| Mosaic attenuation | 34 (77) |
| Lymphadenopathy | 4 (9) |
| Interstitial fibrosis | 4 (9) |
| Emphysema | 2 (5) |
| Pleural effusion | 1 (2) |
| Nodule size on follow-up chest CT when performed (n=36) | |
| Follow-up interval months | 31.5 (12.5–52.4) |
| Enlarged | 24 (67) |
| Stable | 12 (33) |
| Size of largest nodule/mass on chest CT based on presence/absence of carcinoid tumour on biopsy mm | |
| Carcinoid tumour found on biopsy | 17 (11–22) |
| No carcinoid tumour on biopsy | 5 (5–7) |
Data are presented as n (%) or median (interquartile range).