Synovial inflammatory cell reaction in chronic arthritis.
D000293:Adolescent; D000328:Adult; D001171:Arthritis, Juvenile / Q000473:pathology*; D001172:Arthritis, Rheumatoid / Q000473:pathology*; D006801:Humans; D007962:Leukocytes; D008214:Lymphocytes; D010950:Plasma Cells; D013167:Spondylitis, Ankylosing / Q000473:pathology*