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Chest radiograph classification of pulmonary sarcoidosis

Dr Yuranga Weerakkody and Dr Vinod G Maller et al.

Pulmonary sarcoidosis may be classified on a chest radiograph into 5 stages ^1-2:

stage 0 : normal chest radiograph
- 5 - 10% of patients at presentation
stage I : hilar or mediastinal nodal enlargement only
- 45 - 65% of patients at presentation
- 60% go onto complete resolution
stage II : nodal enlargement and parenchymal disease
- 25 - 30% of patients at presentation
stage III : parenchymal disease only
- 15% of patients at presentation
stage IV : end-stage lung (pulmonary fibrosis)

Although in general patients progress from one stage to the next this system does to correlate particularly well on clinical severity ^1,2. In fact, chest x-ray appearances often are more dramatic than functional impairment ².

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