4.This is Monckeberg's medical calcific sclerosis, which is the most insignificant form of arteriosclerosis (both atherosclerosis and arteriolosclerosis are definitely significant). Note the purplish blue calcifications in the media; note that the lumen is unaffected by this process. Thus, there are no real clinical consequences. Remember this process when calcified muscular arteries show up on a radiograph of the pelvic region in an older person.