1: Thickening and hyalinization of vessel wall; vessel wall double normal thickness; hyalinization and stenosis; sclerosis with stenosis or complete occlusion; fibrinoid necrosis
Intestinal wall fibrosis
0: None
1: Submucosa two to four times normal thickness; broadened and hyalinized collagen fibers; abnormal collagen fibers; massive fibrosis including muscularis