Keywords

These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

figure a

Pneumonia is the most frequent acute complication of chronic obstructive pulmonary disease. In patients with emphysema consolidation of the pulmonary tissue caused by pneumonia may look nonuniformly “perforated” so forming the “Swiss cheeseappearance (↑). The presence of emphysema often leads to wrong diagnosis of interstitial lung disease in such cases.