Journal of Surgical Case Reports, 2016;4, 1–3 doi: 10.1093/jscr/rjw053 Case Report

CASE REPORT

Endometrial decidualization: a rare cause of acute appendicitis during pregnancy Skyle J. Murphy1,*, Anupinder Kaur2, and Martin E. Wullschleger3 1

Department of Surgery, Logan Hospital, Meadowbrook, QLD, Australia, 2Department of Obstetrics and Gynaecology, Logan Hospital, Meadowbrook, QLD, Australia, and 3Department of Trauma, Gold Coast University Hospital, Southport, QLD, Australia *Correspondence address. Department of Surgery, Logan Hospital, Meadowbrook, QLD 4131, Australia. Tel : +61 07 3299 8899; E-mail: [email protected] health.qld.gov.au

Abstract Appendicular endometriosis is a rare and poorly understood pathology that affects women in their reproductive years. In the gravid woman, ectopic endometrial tissue undergoes decidualization. This physiological process can result in acute appendicitis in exceptional cases. Here we describe a patient in her second trimester of pregnancy who presented with right iliac fossa pain and clinical, laboratory and imaging findings consistent with acute appendicitis. A laparoscopic appendectomy was performed with intraoperative findings suspicious for malignancy. Histological analysis made the surprising diagnosis of decidualized endometriosis causing luminal constriction resulting in acute appendicitis. We also detail the challenging diagnostic and management issues faced by clinicians in such cases.

INTRODUCTION Endometriosis, defined as the presence of functional endometrial tissue located outside of the lining of the uterine cavity, is a common disorder affecting up to 10% of women of reproductive age [1]. Ectopic endometrial tissue is typically found in the genital tract and pelvic peritoneum [1]. Implantation in the gastrointestinal system is rare, with the prevalence of appendicular endometriosis thought to be

Endometrial decidualization: a rare cause of acute appendicitis during pregnancy.

Appendicular endometriosis is a rare and poorly understood pathology that affects women in their reproductive years. In the gravid woman, ectopic endo...
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