Idiopathic myointimal hyperplasia of mesenteric veins mimicking steroid-refractory ulcerative colitis: A case report

Figure 6 Postoperative follow-up sigmoidoscopy of the rectal stump at 3 months and 12 months after surgery. A: At 3 months after surgery, the rectal stump showed mild erythema and friability without definite ulceration; B: At 12 months after surgery, the rectal stump demonstrated recurrent mucosal inflammation with erythema, friability, and newly developed shallow ulcerations. These findings indicate interval worsening of rectal inflammation over time.