Diagnoses in patients included in the European Respiratory Society Task Force study
| Patients | Lung biopsy | ||
| All | Aged <2 yrs | ||
| Pulmonary haemosiderosis | 14 | 5 | 6 |
| Pulmonary alveolar proteinosis | 14 | 7 | 7 |
| Hypersensitivity pneumonitis | 24 | 0 | 8 |
| Langerhans cell histiocytosis | 3 | 3 | |
| Sarcoidosis | 29 | 1 | 11 |
| Pulmonary lymphangioleiomyomatosis | 1 | 1 | |
| Lymphocyte infiltrative disorder | 1 | ||
| Auto-immune related interstitial lung disease | 3 | ||
| Desquamative interstitial pneumonitis | 13 | 11 | 13 |
| Usual interstitial pneumonitis | 7 | 2 | 7 |
| Lymphoid interstitial pneumonitis | 1 | ||
| Idiopathic pulmonary fibrosis | 46 | 12 | 32 |
| Interstitial pneumonitis | 21 | 15 | 17 |
Data presented as n