Umbilical Endometriosis: A Case Study

Husam Zain
In: Medical Forum Monthly · 2026 · vol. 37(8) · doi:10.60110/medforum.370829 · W7204923942
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This case study describes a 29-year-old woman with primary infertility presenting cyclical umbilical pain and discharge, confirming that umbilical endometriosis can occur without prior abdominal surgery.

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This case report describes a 29-year-old Sudanese woman presenting with cyclical umbilical pain, discharge, and a firm nodule, alongside symptoms of dyspareunia and primary infertility. Diagnostic ultrasonography identified a superficial avascular hypoechoic mass consistent with umbilical endometriosis, despite the absence of prior abdominal surgery or trauma. The authors conclude that clinicians should consider this rare extrapelvic condition in reproductive-age women exhibiting cyclic umbilical symptoms, even without surgical history. This paper is centrally about endometriosis — specifically a rare presentation known as umbilical endometriosis or Villar’s nodule.

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Abstract

Background: Umbilical endometriosis is a rare form of extrapelvic endometriosis characterized by the presence of functional endometrial tissue within the umbilical region. Case Presentation: We report the case of a 29-year-old Sudanese nulliparous woman who presented with a two- year history of cyclical dull umbilical pain associated with deep red discharge, worsening during menstruation. She also reported dyspareunia and primary infertility. There was no history of abdominal surgery or trauma. Physical examination revealed a 2 cm bluish, firm, tender, and irreducible umbilical nodule. Ultrasonography demonstrated a superficial avascular hypoechoic mass suggestive of umbilical endometriosis. Conclusion: Umbilical endometriosis should be considered in women of reproductive age presenting with cyclical umbilical pain and bleeding, even in the absence of prior surgical history.
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Background

Umbilical endometriosis is a rare form of extrapelvic endometriosis characterized by the presence of functional endometrial tissue within the umbilical region. Case Presentation: We report the case of a 29-year-old Sudanese nulliparous woman who presented with a two- year history of cyclical dull umbilical pain associated with deep red discharge, worsening during menstruation. She also reported dyspareunia and primary infertility. There was no history of abdominal surgery or trauma. Physical examination revealed a 2 cm bluish, firm, tender, and irreducible umbilical nodule. Ultrasonography demonstrated a superficial avascular hypoechoic mass suggestive of umbilical endometriosis.

Conclusion

Umbilical endometriosis should be considered in women of reproductive age presenting with cyclical umbilical pain and bleeding, even in the absence of prior surgical history. Downloads Published Issue Section License Copyright (c) 2026 Medical Forum Monthly This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

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