Fig. 6
From: Difficult and complicated oral ulceration: an expert consensus guideline for diagnosis
A 13-year-old boy with recurrent oral ulcers for 3 years, reappear 1 month. A 1.3 × 1.5 cm ulcer on the left buccal mucosa, covering with yellowish-white pseudomembrane. Inflammatory ulcer was confirmed pathologically. Further detailed history inquiry of intestinal diseases revealed that he had abdominal pain when oral ulcers occurred. Colonoscopy showed irregular ulcers located on ileocecal and terminal ileum. And he was confirmed as Crohn’s disease by intestinal mucosal biopsy. There was no recurrence of oral ulcer after the treatment of Crohn’s disease
