Ulcerative Colitis - Endoscopic Assessment of Disease Activity UCEIS Score 0, Mayo Score 0 - Normal UCEIS Score 1-3, Mayo Score 1 - Erythema, decreased vascular pattern, mild friability UCEIS Score 4-6, Mayo Score 2 - Marked erythema, absent vascular pattern, friability, erosions UCEIS Score 7-8, Mayo Score 3 - Spontaneous bleeding, ulceration #Ulcerative #Colitis #UC #Endoscopy #grading #severity #diagnosis #gastroenterology #UCEIS #scoring #ibd