Fig. 4From: Thyroid Rosai-Dorfman disease with infiltration of IgG4-bearing plasma cells associated with multiple small pulmonary cystsDetailed view of the immunostaining results showing histiocytes strongly positive for CD68 (a) and S100 (b), negative staining for CD1a (c), and increased numbers of IgG4-bearing plasma cells (d). Original magnification A-D × 400Back to article page