title: Histopathology of the joint.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000473:pathology*; D002648:Child; D006801:Humans; D007596:Joints / Q000473:pathology*; D013582:Synovial Fluid / Q000166:cytology; D013583:Synovial Membrane / Q000648:ultrastructure