Staging of pulmonary sarcoidosis based on chest X-ray.
|0||Absence of chest X-ray abnormalities|
|1||Bilateral hilar lymphadenopathy that may be accompanied by right paratracheal and aortopulmonary window adenopathy|
|2||Bilateral hilar lymphadenopathy and parenchymal infiltration with a bilateral symmetric micronodular or reticulonodular pattern with predominant perihilar distribution, in middle and upper lung fields|
|3||Parenchymal infiltration without hilar adenopathy|
|4||Fibrosis with evidence of reticular pattern with traction bronchiectasis, masses causing architectural distortions, or honeycomb cysts, predominantly in the upper fields |