可见巨细胞散在分布。右上的插图显示的是巨细胞内的粉红色圆形胞浆内包涵体，它在呼吸道合胞病毒( RSV )感染中很典型，在婴儿和2 岁下面的的儿童中是引起肺炎一个常见的病因。
Scattered giant cells with a scant mononuclear interstitial infiltrate are seen. The pink, rounded intracytoplasmic inclusion in the giant cell of the inset at the upper right is typically seen with respiratory syncytial virus (RSV), a common cause for pneumonia in infants and children under 2 years of age.
