Fig. 7

Rosai–Dorfman disease. Histopathological findings of the skin biopsy from the patient III.20 showed a dense inflammatory cell infiltrate, rich in plasma cells and histiocytes (a, HE*40), stained positive with CD68 (b, × 400) and S-100 protein (d, × 400) immunohistochemistry with emperipolesis/lymphocytophagocytosis (c, HE*400)