VP05.10: Endometriosis within the inguinal canal: a case report

42-year-old female presents to the Emergency Department with a palpable right groin mass, which has been increasing in size over the past three days. Patient reported no significant medical history. Clinical examination revealed an immobile, non-fluctuant tender mass. Patient was afebrile and denied urinary symptoms. Initial ultrasound demonstrated a multiloculated, non-compressible avascular cystic mass tracking along the inguinal canal towards the deep inguinal ring. This lesion was lateral to the inferior epigastric vessels. The mass was irreducible with manual probe pressure or Valsalva manoeuvre. Small adjacent lymph nodes were present. Contrast-enhanced CT of the abdomen and pelvis demonstrated a complex cystic structure that was adherent to the broad ligament, extending from the deep ring, continuous through the inguinal canal and into the right inguinal region. Differential diagnoses include herniated ovary through the patent processus vaginalis. Due to concerns regarding ovarian viability, the patient underwent a diagnostic laparoscopy under the surgical team with intra-operative gynecological review. Normal appearing ovaries were present within the pelvis, with an endometrioma present within the inguinal canal that was adherent to the round ligament. An open inguinal hernia repair was performed. Despite lack of catamenial symptoms, surgical findings were consistent with Stage IV endometriosis. Despite being relatively rare, it is important to be aware of extra-pelvic endometriosis due to the small possibility of malignant transformation. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.