LAUSR

Study Objective To determine the prevalence of appendiceal pathology (i.e. endometriosis, fibrous obliteration, tumor, acute/chronic inflammation) in patients with biopsy proven endometriosis. Design Retrospective chart review. Setting Two Large Metropolitan Academic Hospitals. Patients or Participants 100 patients between the ages of 16 to 51 diagnosed with endometriosis following minimally invasive excision surgery with concomitant appendectomy for suspected endometriosis from February 2012 to June 2017. Interventions Medical records and postoperative pathology reports were analyzed for all 100 patients with biopsy proven endometriosis for the presence of appendiceal pathology. Measurements and Main Results Among the 100 patients with biopsy proven endometriosis and concomitant appendectomy, 42% (95% CI:32.3-51.7%) were diagnosed with appendiceal pathology (i.e. endometriosis, fibrous obliteration, tumor, inflammation). Of these 100 patients, 18% (95% CI:10.5-25.5%) had underlying appendiceal endometriosis and 17% (95% CI: 9.6-24.4%) had underlying fibrous obliteration. Two percent (95% CI:0.0-4.7%) of patients were diagnosed with tumors, which comprised of one neuroendocrine carcinoid tumor (0.6 cm) and one LAMN (low grade appendiceal mucinous neoplasm). Five percent (95% CI:0.7-9.3%) of patients were diagnosed with inflammation, including acute and chronic appendicitis. Conclusion Our findings of a 42% prevalence rate of appendiceal pathology and 18% prevalence of appendiceal endometriosis suggests that surgeons should consider concomitant appendectomies in patients with biopsy proven endometriosis.