age peak
15-30
60
gender
M=F
smoking risk
protective
pathology
confluent, non-granulomatous inflammation
inflammation of distal terminal ileum (backwash ileitis)
ulcers are linear and may overlie taenia coli
surviving patches of mucosa form pseudo-polyps
location
rectum is commonest site
rectum to ileocaecal valve
proctitis (rectum only affected)
presentation
bloody diarrhoea
perianal lesions uncommon
crampy lower abdo discomfort
urgency and tenesmus if in rectum
cancer risk
higher than CD
but better prognosis Ca
local complications
blood and fluid loss
toxic megacolon
perforation
dysplasia and carcinoma