Rheumatoid arthritis cells.
D001172:Arthritis, Rheumatoid / Q000175:diagnosis / Q000473:pathology*; D006801:Humans; D007962:Leukocytes / Q000473:pathology*; D012217:Rheumatoid Factor; D013582:Synovial Fluid / Q000473:pathology
D012217:Rheumatoid Factor