Inguinal endometriosis treated via laparoscopic resection: A case report

Akimichi Imamura, Amu Imamura, Yuma Ebihara, Ryo Tabata, N Murakami, Shimpei Hori, Shinjiro Hori, Takashi Idegami, Futoshi Arakane
In: JAPANESE JOURNAL OF GYNECOLOGIC AND OBSTETRIC ENDOSCOPY · 2025 · vol. 41(2) , pp. 77–82 · doi:10.5180/jsgoe.41.2_77 · W4416805376
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⚙ AI-generated summary by claude@2026-06, 2026-06-08 ⓘ

This report details a case of laparoscopic excision for inguinal endometriosis, an uncommon condition typically treated percutaneously.

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⚙ AI-generated deep summary by claude@2026-06, 2026-06-09 · read from full text ⓘ

This Japanese case report describes a rare instance of inguinal endometriosis treated with laparoscopic excision in a 50-year-old woman who had right inguinal pain and a palpable mass sensation despite prior dienogest therapy. Using transabdominal ultrasonography and magnetic resonance imaging, the authors diagnosed a hematoma-like mass within the right femoral arteriovenous vein region as right inguinal endometriosis, and pathology confirmed endometriosis after removal of an approximately 1 cm mass with peripheral expansion of the right round ligament. The patient also had uterine fibroids and a left ovarian endometriotic cyst, so the authors performed a total laparoscopic hysterectomy, bilateral oophorectomy/salpingectomy as specified, and concurrent right inguinal mass resection. The paper notes the major limitation that, as a single case report, it provides no generalizable evidence beyond this clinical scenario. This paper is centrally about endometriosis — specifically a laparoscopic management case of inguinal endometriosis with concomitant intra-pelvic disease.

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Abstract

Inguinal endometriosis is very rare, and a percutaneous approach is predominantly used for surgical resection. Here, we report a case of laparoscopic excision for inguinal endometriosis.
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症例報告 腹腔鏡下アプローチにより切除した鼠径部子宮内膜症の一例 2025 年 41 巻 2 号 p. 77-82 詳細 抄録 Inguinal endometriosis is very rare, and a percutaneous approach is predominantly used for surgical resection. Here, we report a case of laparoscopic excision for inguinal endometriosis. A 50-year-old female patient was treated with dienogest for endometriosis by her previous physician, who referred her to our hospital because of pain and mass sensation in the right inguinal region. She had right inguinal region tenderness, and transabdominal ultrasonography revealed a 13×11 mm echogenic free space in the same region. A blood test revealed a CA125 level of 13.9 U/ml, while a magnetic resonance imaging scan showed a hematoma-like mass, approximately 10 mm in diameter, inside the femoral arteriovenous vein in the right inguinal region, leading to the diagnosis of right inguinal endometriosis. Additionally, she had uterine fibroids and a left ovarian endometriotic cyst and thus simultaneously underwent a total laparoscopic hysterectomy, right oophorectomy, left salpingo-oophorectomy, and right inguinal mass resection in the Department of Surgery. The round ligament in the right inguinal canal was expanded peripherally, and an approximately 1 cm mass lesion in the right inguinal region was excised. The specimen was pathologically diagnosed as endometriosis. Reportedly, 91% of patients with inguinal endometriosis had intraperitoneal endometriosis. Therefore, intraperitoneal endometriosis should be considered on diagnosis of inguinal endometriosis, and a laparoscopic approach may be effective for surgical resection. © 2025 日本産科婦人科内視鏡学会

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endometriosis

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