I'm fairly confident this is what they mean. Atherosclerosis affects the artery wall by default, so use of the terms "parietale" is unnecessary.

"The atherosclerosis in 30-month-old WHHL-MI rabbits progressed extensively and anatomically, but still trapped 68GaDOTA-FAMP, whereas in the 8-month-old WHHL-MI rabbits there was mixed atherosclerosis with plaque-rich/-poor lesions."

"A. Motion artifact in the mid LAD B. Mild noncalcific atherosclerosis in the mid LAD C. Moderate mixed atherosclerosis in the mid LAD.".
Cardiac Computed Tomography: Problem-Based Learning
By Milind Y. Desai, Paul Schoenhagen
http://ow.ly/HGZkl

"Diagnosis and surgical treatment methodology for mixed atherosclerosis of coronary and other arteries of different location was produced."
http://www.stf.mn/index.php?option=com_content&view=article&...

We support the suggestion of Mozes ec al. 4 that there are three classes of Buerger's disease, since all clinical criteria cannot i::l all cases be met. These classes are: (I) unequivocal Buerger's disease with criteria fulfilled; (il) 'Buerger's syndrome', where the clinical evidence favours Buerger's disease but all criteria cannot be met; and (iii) mixed atherosclerosis and Buerger's disease, where radiological signs of atherosclerosis are noted but Buerger's disease is favoured on clinical grounds."
http://ow.ly/HH06z