Rheumatoid arthritis in the elderly.
What is currently classified as rheumatoid arthritis in the elderly (that is, late onset after age 60) may in fact include a number of separable distinct diseases. Identifiable subsets include seropositive or 'classic' rheumatoid arthritis, Sjögren's syndrome with a limited form of arthritis, and a seronegative benign synovitis akin to polymyalgia rheumatica.
D000368:Aged; D001172:Arthritis, Rheumatoid / Q000145:classification / Q000175:diagnosis / Q000453:epidemiology*; D006680:HLA Antigens / Q000276:immunology; D006801:Humans; D008875:Middle Aged; D011111:Polymyalgia Rheumatica / Q000175:diagnosis; D012217:Rheumatoid Factor / Q000032:analysis; D012859:Sjogren's Syndrome / Q000175:diagnosis; D013585:Synovitis / Q000175:diagnosis
D006680:HLA Antigens; D012217:Rheumatoid Factor