the vascular lesion of thrombotic thrombocytopenic purpura was characterized by two distinct types of changes in the arteriole of the heart and brain : ( 1 ) multiple incomplete vascular occlusions due to the subendothelial deposits composed of a homogeneous fibrin fibrinogen-like substance and platelets without the formation of polymerized fibrin ;
C0005847
vascular
C0034155
thrombotic thrombocytopenic purpura