广泛的溃疡性结肠炎，左边较低处可见回盲瓣。瓣膜上方开始带有红斑和颗粒性的粘膜炎症。随着病程的发展，粘膜损害发生融合，破坏残留的粘膜以至形成线性溃疡。
Here is another example of extensive ulcerative colitis (UC). The ileocecal valve is seen at the lower left. Just above this valve in the cecum is the beginning of the mucosal inflammation with erythema and granularity. As the disease progresses, the mucosal erosions coalesce to linear ulcers that undermine remaining mucosa.
