Focal Intimal Lysis-A precursor Lesion of Coronary Atherosclerosis

Two hundred and six cases aged ftom newborn to 50 years old of coronary arteries were studied with light and eledtron microscope. Special attention was paid to a lesion called focal intimal lysis. The authors emphasized that this lesion is a typical precursor of atherosclerosis （AS） because the site of the lesion was correlated well with that of AS, and a tendency of transition from the lesion to AS plaque was noted morphologically. The incidence, sites frequentiy involved, and the machanism of the lesion, its relation to AS were also studied.