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Figure 4: A few CD123+ pDCs, as the one indicated by the thin arrow, in the inflammatory infiltrate of a Darier’s disease case (a). In pemphigus vulgaris, CD123+ pDCs are more numerous, usually found in the dermis and/or inside the bulla ((b), thin arrow). A lichen ruber planus skin sample showing a high number of single or grouped CD123+ pDCs in the dermal inflammatory infiltrate (c). The endothelium of vessels ((a), (b), (c), thick arrows) is also weakly stained by the antiCD123 antibody. Immunohistochemistry; original magnification, ×200. Scale bar: A = 35 μm; B, C = 45 μm; Chromogen: fuchsin.