Sarcoidosis

Headline
Etiology Non-caseating granulomas in affected tissue. Linked with HLA-B8?
Epidemiology
Clinical presentation Ddx:
("Löfgren syndrome") fever, hilar LNA, erythema nodosum. Symmetric arthritis, erythema nodosum
facial nerve palsy, splenomegaly, uveitis, sicca... Ddx: lymphoma, TB
Pathogenesis
Diagnostic investigations ECG, CXR, lung function tests, CT chest, calcium (↑), serial ACE. Histology is dxc.
Management Complications: hypercalcaemia
steroids if symptomatic; inhaled steroids to control cough, pulmonary rehab
66% remission without treatment
Prevention