The Swiss cheese sign has been used for the appearance on CT of fluid-containing pneumatoceles, that typically occur following pulmonary lacerations 1. They have also been described on CT appearances where there is pulmonary infection superimposed on emphysema 2.
The pneumatocoeles appear as 'holes' in the lung parenchyma and hence the description with respect to Swiss-style cheeses (e.g. Emmental), which contain multiple holes.
It is sometimes used by pathologists to describe the gross pathological appearance in juvenile papillomatosis of the breast.
- 1. Oikonomou A, Prassopoulos P. CT imaging of blunt chest trauma. Insights Imaging. 2011;2 (3): 281-295. doi:10.1007/s13244-011-0072-9 - Free text at pubmed - Pubmed citation
- 2 . Nambu A, Ozawa K, Kobayashi N, Tago M. Imaging of community-acquired pneumonia: Roles of imaging examinations, imaging diagnosis of specific pathogens and discrimination from noninfectious diseases. (2014) World journal of radiology. 6 (10): 779-93. doi:10.4329/wjr.v6.i10.779 - Pubmed