Ulcerative colitis and Crohn disease are related chronic inflammatory bowel diseases (IBDs), with a combined incidence of 11 to 19 per 100 000 persons in the United States.1 Although the cause of IBDs is unknown, they are classified as autoimmune diseases.2 Patients with IBD show antibodies against different antigens, although it is still unclear if they represent an epiphenomenon of chronic inflammation or represent the cause of IBD.3
Rossato M, Foresta C. Antisperm Antibodies in Inflammatory Bowel Disease. Arch Intern Med. 2004;164(20):2281–2283. doi:10.1001/archinte.164.20.2283
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