Sarcoidosis is a multisystemic disorder of unknown aetiology which is characterised by non-caseating
granulomatous inflammation that involves the lung in about 90% of affected patients. A characteristic
feature is bilateral hilar lymphadenopathy, which is often symptomless and detected on routine CXR.
Radiological lung involvement can be associated with or occur independently of hilar lymphadenopathy.
may be asymptomatic...