Homogeneous consolidation that almost invariably abuts against a visceral pleural surface and almost always contains an air bronchogram.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgLVELUIEwxRCAfJcwWeRnBqbdAwedHuSE3-MhXnr-3RY4nzCtYgJkMhipbu03g3LYIGJ-Pu6WEo4BzALjC90L0ykdHprQKoee3smz1RLvspA28M6D-L3unyWjfAdw2AOc7xsCKPLWdp341/s280/pneumo.bmp)
Note that this infection most commonly occurs in alcoholics and other compromised hosts. Cavitation and pleural reaction are rare.
In children, may produce the so-called round or spherical pneumonia, in which a well-circumscribed spherical consolidation on both frontal and lateral views simulates a pulmonary or mediastinal mass (See the figure below)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjgdw-bLPno5jak9FH5ae42xpUe4UgbxWUh5uY1_S3jaTQkaTPDqMHq1a80bIE2n8SX0lP_8JsNtDSfJqsnJq60ioTy5mecbb-jbXdRXbwCJZhsX5xQBQr7D6_HRZwCIuUK9XNO6HcRxVEB/s280/pneumo1.bmp)