<prompt> The most likely cause of bihilar lymphadenopathyHistoplasmosisTuberculosisSarcoidosisAspergillosis  <response>: Sarcoidosis is a multi system granulomatous disorder of unknown etiology characterised by the presence of non-caseating granulomas.The definitive feature of Sarcoidosis in a chest X ray is bilateral hilar lymphadenopathy.Lofgrens syndrome is an acute illness characterised by erythema nodosum,peripheral ahropathy,uveitis,bilateral hilar lymphadenopathy,lethargy and occasionally fever. Reference:Davidson s Medicine-22 nd edition,page no:710 Harrison 