The terms pneumonia and pneumonitis are often used interchangeably. In SNOMED CT, pneumonia is used for infectious causes, and pneumonitis is used for noninfectious causes.
Some concepts may contain a synonym with the other pneumoni- term due to high/common usage in medical literature.
Pneumonia is a type of pneumonitis, as inflammation is present in both. The distinguishing feature between the two disorders is the presence of infection in pneumonia. Pneumonia has a Pathological process (attribute) of Infectious process (qualifier value); Pneumonitis does not.
Figure 1: Stated view of 205237003 |Pneumonitis (disorder)|
Figure 2: Stated view of 233604007 |Pneumonia (disorder)|
Morphologic abnormality
The morphologic abnormality for both 233604007 |Pneumonia (disorder)| and 205237003 |Pneumonitis (disorder)| is 409774005 |Inflammatory morphology (morphologic abnormality)|.
The clinically-warranted morphologic abnormality for many subtypes of pneumonia is 707496003 |Inflammation and consolidation (morphologic abnormality)|. Consolidation is a feature of most forms of pneumonia; however, it may not be a feature of all pneumonias, such as atypical pneumonias.
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