Figure 2.

Microscopic analysis of synovial inflammation with lymphocytes in early untreated Behçet synovitis (BD) versus psoriatic synovitis (PsA). Representative pictures are shown of the immunostainings for CD20⁺ B lymphocytes; CD138⁺ plasma cells; CD3⁺, CD4⁺, and CD8⁺ T lymphocytes; and CD56⁺ natural killer cells. The number of infiltrating CD3⁺ T lymphocytes was significantly increased in BD versus PsA. Original magnification ×20.