The term segmental pneumoniais used

The term segmental pneumoniais used when such consolidation is not extensive enough to occupy most of a lobe but corresponds more closely to the anatomy of a bronchopulmonary segment in one or more lobes. Where the area of radiographic shadowing is even more confined, then subsegmental pneumonia is an appropriate descriptive term, although this still implies a confluent and localized process. Where subsegmental shadowing is patchy (non-confluent) and poorly localized, being scattered throughout part or the whole of one or both lungs, the term bronchopneumonia remains entirely acceptable.