Sarcoidosis

Etiology: multisystem disorder of unknown etiology characterized by the formation of inflammatory non-caseating granulomas within affected tissues
Imaging: symmetric hilar and mediastinal lymphadenopathy, perilymphatic nodules, pleural effusions

Cases of Sarcoidosis

CXR of sarcoidosis — CXR PA and lateral shows bilateral hilar lymphadenopathy, left greater than right, with the lungs being clear.