The increased use of advanced medical therapies has not extended the time to colectomy or reduced colorectal cancer (CRC) rates in patients with ulcerative colitis; however, an increased rate of ...

(A) Severe ulcerative colitis with ulceration and spontaneous bleeding (the Mayo Endoscopy Score =3); (B) Colitis-associated high-grade dysplasia in a flat rectal lesion (green arrows); (C) Normal ...