Acidophilic round or oval viral inclusion bodies were found in the cyst wall cells and keratinized meshes of cystic cavity.

• 皮损组织病理检查显示真皮内见一囊肿,囊壁细胞内见嗜酸性圆形或椭圆形病毒包涵体,囊腔内的角质物网眼内亦见病毒包涵体。