Mononuclear cell infiltration of the aortic intima in domestic swine.

The preparation of thick endothelial "häutchen" from microscopically lipid-free areas of the thoracic and abdominal aorta of 22 domestic pigs proved that there is a surprisingly frequent penetration of mononuclear blood cells into the subendothelial space. They are deposited on the intima in a diffuse or focal distribution as dense epi-, inter- and subendothelial cell infiltrates.