



Hilar and right paratracheal lymphadenopathy.
Mediastinal lymphadenopathy.
Upper lung reticulonodular opacity.
Pleural effusion: uncommon
Reference: Diagnostic Image Chest
stage 0: normal
stage 1: hilar lymphadenopathy
stage 2: hilar lymphadenopathy and bilateral reticular nodular pattern
stage 3: reticular nodular interstitial infiltration, no LAP
stage 4: mass, fibrosis
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