Appendectomy protects against the development of ulcerative colitis and reduces its recurrence

Appendectomy is more frequent but not a risk factor in Crohn’s disease while being protective in ulcerative colitis: a comparison of surgical procedures in inflammatory bowel disease

Appendectomy, tonsillectomy, and risk of inflammatory bowel disease

Appendicectomy, childhood hygiene, Helicobacter pylori status, and risk of inflammatory bowel disease: a case control study

Appendectomy and the risk of developing ulcerative colitis or Crohn’s disease: Results of a large case-control study. South Limburg Inflammatory Bowel Disease Study Group

Appendectomy and Tonsillectomy in Patients with Inflammatory Bowel Disease

Epidemiology of appendicectomy in primary sclerosing cholangitis and ulcerative colitis

Appendectomy is followed by increased risk of Crohn’s disease

Protective role of appendicectomy on onset and severity of ulcerative colitis and Crohn’s disease

Appendectomy and Protection against Ulcerative Colitis