Sarcoidosis is a systemic disease of unknown cause that is characterised by the formation of immune granulomas in various organs, mainly the lungs and the lymphatic system.
Sarcoidosis might be the result of an exaggerated granulomatous reaction after exposure to unidentified antigens in individuals who are genetically susceptible.
Diagnosis is made by symptoms, PFTs, CXR, CT, endobronchial ultrasound and PET for assessment of inflammatory activity.
Recognition of unexplained persistent disabling symptoms, fatigue, small-fibre neurological impairment, cognitive failure, and changes to health state and quality of life, has improved.
Mortality in patients with sarcoidosis is higher than that of the general population, mainly due to pulmonary fibrosis.
Sarcoidosis - The Lancet http://bit.ly/1eh9I5S
Image source: Lungs, Wikipedia, public domain.