Endometriosis of the Appendix Masquerading as Appendicitis in a 34-Week Pregnant Woman: Case Report and Review of the Literature

Endometriosis is most commonly found in women of childbearing age with the most common sites of disease being the ovaries, uterine ligaments, recto and vesicovaginal areas, pelvic peritoneum, cervix, labia and vagina. Endometriosis of the appendix is an extremely rare finding. In this report we describe a patient in her 3rd trimester of pregnancy that presented with acute abdominal pain with clinical examination, laboratory investigation and imaging consistent with acute appendicitis. She underwent laparoscopic appendectomy without complication but with the surprising pathological diagnosis of endometriosis of the appendix. We discuss the management and relevant literature of the diagnosis of endometriosis of the appendix in pregnancy.