Expression of IL-4 R and IL-6R in tonsillar lymphoid follicle. (A and D) Immunostains of IL-4R (A) and IL-6R (D). There is a positive lacy pattern of dendritic-shaped cells as well as a few lymphocytes mainly in the light zone. Counterstained with methyl green. (A and D) Original magnification × 328. (B, C, and E) Immunocytochemical stainings of IL-4R (B, single staining of IL-4R; C, double staining of IL-4R and R4/23) and IL-6R (E, single staining of IL-6R) on isolated FDCs. The positive reaction on FDCs is found. Counterstained with hematoxylin. (B), (C), and (E) Original magnification × 1,280.