Two volumes contain 124 papers on topics including arthroscopy; apoptosis; cytokins and their receptors; cyclosporine; biologic agents; gene therapy; scleroderma variants; articular cartilage repair; the epidemiology of rheumatic diseases; the biology of cellular participants in the inflammatory response including neutrophils, monocytes, eosinophils, mast cells, and platelets; the bases of T cell and immunoglobulin diversity; the heterogeneity of enzymes involved in the generation of arachidonic acid; and the role of bacteria in the pathogenesis of reactive arthritis and enteropathic arthritis.