Overview: Classification of Rheumatic Disease
Meridith Balbach
Classification approach to select rheumatologic diseases. See specific sections for comprehensive review of each specific clinical entity.

SpA= seronegative spondyloarthropathy; RA= rheumatoid arthritis; SLE= systemic lupus erythematosus; SSc= systemic sclerosis; UCTD= undifferentiated connective tissue disease; MCTD= mixed connective tissue disease; IgG4-RD= IgG4-related disease; GPA= granulomatosis with polyangiitis; EGPA= eosinophilic granulomatosis with polyangiitis; MPA= microscopic polyangiitis; HSP= Henoch Schönlein purpura; Cryo= cryoglobulinemia, CTD= connective tissue disease; PMR= polymyalgia rheumatica; FMF= familial Mediterranean fever; EDS= Ehlers-Danlos syndrome
