单纯疱疹病毒感染:口唇皮肤(显微镜) 食管鳞状上皮 脑炎（电子显微镜）
The esophageal squamous epithelium here is from a sharply demarcated "punched out" ulcer from Herpes simplex virus infection. Note the mauve to pink intranuclear inclusions. Often, multinucleated cells are seen. Such infections are most common in immunocompromised hosts.