Fig. 2. (A) Histopathologic findings show dense infiltration around vessels and eccrine glands in dermis and subcutaneous tissue (H&E, ×40). (B, C) Lymphohistiocytic infiltration around vessels, fibrinoid necrosis (arrow) of vessel wall, thrombus deposition and halo within vessel, and lymphoid dust are shown (H&E, ×400). (D) Vessel wall with hyalinization is rimmed by abundant lymphohistiocytes (H&E, ×200). (E) Vessel lumen with attenuated endothelium (arrow) contains numerous red blood cells (H&E, ×400). (F) Mitotic figure (arrowhead; H&E, ×1,000) and (G) large atypical pleomorphic cells with hyperchromatic nuclei (arrowheads) are shown in dermis (H&E, ×400) (case 5).