大量的粘多糖沉积,新形成的毛细血管的数量和血管周围淋巴细胞浸润在天车的活跃阶段。(一))×4。表皮是正常的。略低于表皮真皮是一个相对不变的地带。网状真皮的上层是明显的粘蛋白变性广泛分离,磨损和分散胶原束。底层的网状真皮被新形成的毛细血管,血管周围炎性细胞浸润,成纤维细胞的增殖。(b))×20和(c))×40。血管周围和真皮淋巴细胞浸润。(d))×4。阿尔新蓝染色显示大量的粘多糖沉积在真皮的底层和网状真皮。 (e) ×40. Immunohistochemical staining by anti-CD8 monoclonal antibody showed a large proportion of infiltrates were CD8+ T lymphocytes (arrows) in the dermis and perivascular regions. (f) ×40. Immunohistochemical staining by anti-CD4 monoclonal antibody showed a CD4+ T-cell infiltrate in the dermis and perivascular regions.