Histopathology showed that there were diffuse infiltration of inflammatory cells which were mainly neutrophil and histiocytes in the dermis and dispersively nuclear dust and heterotypic cells.

• 额部皮损组织病理检查:真皮中下层弥漫性炎性细胞浸润,以中性粒细胞、组织细胞为主,散在核尘和异形细胞。