**polymorphs and fibrin is found overlying severely inflamed subepithelial tissues in which bacterial colonies may be seen and around which there may be marked fibrosis in an attempt to “wall off” the lesion. | **polymorphs and fibrin is found overlying severely inflamed subepithelial tissues in which bacterial colonies may be seen and around which there may be marked fibrosis in an attempt to “wall off” the lesion. |