Association of Serum CXCL13 with Intrarenal Ectopic Lymphoid Tissue Formation in Lupus Nephritis

Figure 1

Ectopic lymphoid tissue classifications according to CD20, CD3, and CD21 immunohistochemical features in LN patients (×400). CD20, CD30, and CD21 were stained in serial sections. Class 0 had no CD20+ cell expression, with scattered CD3+ cells only, but without CD21+ cell expression; class 1 had scattered CD20+ cells and CD3+ cells infiltration, but without CD21+ cells infiltration; and class 2 had a nodular aggregation of CD20+ cells and CD3+ cells without CD21+ cell expression.