Stage 2: Bilateral hilar lymphadenopathy with diffuse pulmonary infiltrates Stage 3: Diffuse pulmonary infiltrates without lymphadenopathy Stage 4: Pulmonary fibrosis These stages are prognostic ...

B demonstrates sarcoidosis of the mediastinum and lungs represented by bilateral lobulated enlarged hilar, peritracheal and peribronchial lymph nodes. Minimal streaking in the right midlung area ...