球形肺炎是一种少见的特殊类型的肺部炎症 ,在影像学上与周围型肺癌有相似之处 ,易于误诊。它在ＣＴ上的一个表现———“晕征”值得注意 ,该征象有利于与肺癌的鉴别。本文收集经临床证实的 3例病例作一分析总结 ,旨在提高对该征象的认识。这 3例中 ,2例诊断为肺癌 ,1例诊断为 Spherical pneumonia is a rare and special type of lung inflammation that has similarities with peripheral lung cancer in imaging and is easily misdiagnosed. It is a manifestation of the CT - “halo sign” is worth noting that the signs of lung cancer is conducive to the identification. This article collected three clinically confirmed cases of an analysis summary, aimed at raising awareness of the signs. Of these 3 cases, 2 were diagnosed as lung cancer and 1 was diagnosed as