A case of benign multicystic mesothelioma of the peritoneum (BMMP) arising after delivery

Fuyuka Igarashi, Tomohiro Uda, Keiko Yamaguchi, Genya Sato, Risa Ando, Ryutaro YAMAMOTO, Manami Sakurai
In: JAPANESE JOURNAL OF GYNECOLOGIC AND OBSTETRIC ENDOSCOPY · 2023 · vol. 39(1) , pp. 78–84 · doi:10.5180/jsgoe.39.1_78 · W4386761013
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⚙ AI-generated summary by gemini-2.5-flash-lite, 2026-08-07 ⓘ

This case report details a rare benign multicystic mesothelioma of the peritoneum in a woman who developed the condition after childbirth, highlighting diagnostic challenges and unknown etiopathogenesis.

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⚙ AI-generated deep summary by qwen3.7-flash, 2026-09-17 · read from full text ⓘ

This case report describes a 22-year-old woman who developed abdominal pain and was diagnosed with benign multicystic mesothelioma of the peritoneum one month after vaginal delivery. Preoperative imaging revealed multifocal tumors on the uterine ventral side, while diagnostic laparoscopy identified multiple cysts adherent to the peritoneum and omentum. The final diagnosis was confirmed via pathology, and the patient remained recurrence-free during a nine-month follow-up period despite the condition’s known high recurrence rate. Relevance to endometriosis: listed as an associated risk factor for benign multicystic mesothelioma of the peritoneum, though the paper's main focus is this rare tumor rather than endometriosis or adenomyosis itself.

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Abstract

Benign multicystic mesothelioma of the peritoneum (BMMP) is an uncommon benign tumor that arises from the peritoneum in women of reproductive age. Associated risk factors include endometriosis, pelvic inflammatory disease, and previous abdominal surgery. However, etiopathogenesis is still unknown. The preoperative diagnosis of BMMP is challenging and is confirmed by pathology.
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症例報告 産後に発生した骨盤内腫瘍に対して腹腔鏡下手術を行い、良性多嚢胞性腹膜中皮腫と診断した１例 2023 年 39 巻 1 号 p. 78-84 詳細 抄録 Benign multicystic mesothelioma of the peritoneum (BMMP) is an uncommon benign tumor that arises from the peritoneum in women of reproductive age. Associated risk factors include endometriosis, pelvic inflammatory disease, and previous abdominal surgery. However, etiopathogenesis is still unknown. The preoperative diagnosis of BMMP is challenging and is confirmed by pathology. We report a case of a 22-year-old woman with no medical history who presented with abdominal pain at her one-month checkup after a vaginal delivery a month prior. Contrast-enhanced magnetic resonance imaging showed a multifocal tumor on the ventral side of the uterus. Diagnostic laparoscopy revealed multiple cysts adherent to the peritoneum and omentum. BMMP was diagnosed based on the pathology report, and follow-up did not reveal any recurrence for nine months. The prognosis for BMMP is excellent, despite the high recurrence rate of 50%. Although there is no standard algorithm for the treatment, surgery is considered the primary treatment because of its high recurrence rate after the resection. Long-term follow-up is necessary, and diagnostic laparoscopy is useful given the high recurrence rate. © 2023 日本産科婦人科内視鏡学会

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