Table 1.

Immunohistological characterization of synovial follicular infiltrates

	B cells in the network	B cells associated
Marker	of FDC (GC phenotype)	with T cells	Plasma cells
CD20	+	+	-
CD79	Low	+	-
Ki67	+	-	-
CD38	Low	-	+
WUE-1	-	-	+
VS38c	-	-	+

FDC, follicular dendritic cell; GC, germinal centre.