Results : The typical features of PCP included diffuse reticulo nodular changes and infitration patch or ground glass opacification which distributed in bilateral hilar regions and middle lower lung fields. 结果:典型表现为双侧肺门周围以及中、下肺野弥漫性网状阴影,部分渗出性病变可以相互融合,呈斑片样或磨玻璃样改变。