Clinico-pathological features of mature pDC dermatosis. (A-D) Papulo-nodular skin eruption in patients with pDC dermatosis. (E-F) Dense perivascular dermal infiltrate without blast cells (case 12; HES; original magnifications ×40 and ×330). (G) CD123 expression in mature pDCs (case 12; original magnification ×330). (H) TCF4 expression in mature pDCs (case 12; original magnification ×200). (I) CD2AP expression in mature pDCs (case 12; original magnification ×200). HES, haematoxylin, eosin, saffron.