Japanese Journal of Radiology

, Volume 27, Issue 1, pp 45–47 | Cite as

Magnetic resonance imaging findings of extrapelvic endometriosis of the round ligament

  • Hiroyuki TokueEmail author
  • Yoshito Tsushima
  • Keigo Endo
Case Report


A 31-year-old woman presented with a mass in her groin accompanied by intense pain during the menstrual period. A poorly circumscribed, elastic, hard mass was palpable in her right inguinal region. Magnetic resonance imaging showed that the mass had continuity with the inguinal course of the round ligament of the uterus. The mass lesion was well enhanced with high intensity on diffusion-weighted imaging. An operation was performed, and the histological diagnosis was endometriosis of the round ligament. After operation, she was completely relieved of pain. It is important to include endometriosis in the differential diagnosis in women with painful inguinal mass lesions at risk for endometriosis.

Key words

Endometriosis Round ligament Magnetic resonance imaging (MRI) Diffusion-weighted imaging (DWI) 


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Copyright information

© Japan Radiological Society 2009

Authors and Affiliations

  1. 1.Department of Diagnostic and Interventional RadiologyGunma University HospitalMaebashiJapan

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