rheumatoid nodule

rheumatoid nodule

A mass in tendons, tendon sheaths, periarticular tissue, serous membranes–pleural, pericardium, meninges, cardiac valves, kidneys, lung parenchyma, skin, spleen, synovium, vessels, viscera, in 20% of Pts with rheumatoid arthritis DiffDx Similar nodules occur in SLE, rheumatic fever. See Rheumatoid arthritis.