Revision 29 for 'Pulmonary contusion'

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Pulmonary contusion

A pulmonary contusion refers to an interstitial and/or alveolar lung injury without any frank laceration. It usually occurs secondary to non-penetrating trauma.

Epidemiology

While contusion can affect anyone, children are considered more susceptible due to chest wall greater pliability in that age group.

Radiographic features

In most cases the findings are manifest at the time of the initial examination and show little tendency to increase in severity with subsequent examinations. Radiographic clearing of pulmonary contusion is relatively rapid, and the signs of contusion have often resolved within 48 hours. Features are often not localized in a lobar or segmental pattern.

Plain film

Not sensitive. Faint patchy consolidative regions following history of blunt trauma. Usually shows rapid improvement with time, usually days.

CT

Typically seen as focal, non segmental (typically crescentic) areas of parenchymal opacification. Can have sub-pleural sparing with smaller contusions which can be a distinguishing feature. Commoner posteriorly and in lower lobes.

Differential diagnosis

General imaging differential considerations include

See also

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