Fig. 2From: Rosai-Dorfman disease manifesting as a solitary mass with fat in the thymus a case reportImmunohistochemistry results. S-100 protein staining was strong positive. Thymus-assosiated epithelial cell indicators CK19 was negative. CD3, CD20, CD68 were also positive, CD30, Langerin were negative; and Ki67 index was about 3% in lymphocytes and plasma cells. (a S-100 protein, b HE × 400, c CD3, d CD20, e CD30, f CD68, g CK19, h Langerin, i Ki67)Back to article page