{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,12]],"date-time":"2026-08-12T18:30:19Z","timestamp":1786559419761,"version":"build-2736575974"},"reference-count":11,"publisher":"Oxford University Press (OUP)","issue":"8","license":[{"start":{"date-parts":[[2026,8,12]],"date-time":"2026-08-12T00:00:00Z","timestamp":1786492800000},"content-version":"vor","delay-in-days":11,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,8,4]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Benign multicystic peritoneal mesothelioma is a rare mesothelial neoplasm with fewer than 200 reported cases, typically arising on peritoneal or pelvic surfaces in premenopausal women. We describe a 21-year-old woman with a 2-week history of left lower abdominal pain. Magnetic resonance imaging showed a multiloculated cystic retroperitoneal mass adherent to the sigmoid colon, with normal ovaries and uterus. CA-125 was mildly elevated. At laparotomy, the mass was confirmed to be retroperitoneal without ovarian involvement, requiring en-bloc excision with sigmoid colectomy and primary anastomosis. Histopathology showed flat-to-cuboidal mesothelial cells with a hobnailing pattern in fibromyxoid stroma; immunohistochemistry was positive for calretinin and WT-1, and negative for SALL4, GATA3, and CD31, confirming benign multicystic peritoneal mesothelioma. At 6-month follow-up she remained asymptomatic with no recurrence on imaging. This case highlights BMPM as a mimicker of primary retroperitoneal neoplasms and the potential need for bowel resection to achieve complete excision.<\/jats:p>","DOI":"10.1093\/jscr\/rjag710","type":"journal-article","created":{"date-parts":[[2026,7,24]],"date-time":"2026-07-24T11:44:07Z","timestamp":1784893447000},"source":"Crossref","is-referenced-by-count":0,"title":["Benign multicystic peritoneal mesothelioma presenting as a retroperitoneal pelvic mass in a young woman: a case report"],"prefix":"10.1093","volume":"2026","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4367-6230","authenticated-orcid":false,"given":"Enas A","family":"Amaireh","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology, The Specialty Hospital , Amman ,","place":["Jordan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Osama","family":"Al-Natour","sequence":"additional","affiliation":[{"name":"Department of General Surgery, The Specialty Hospital , Amman ,","place":["Jordan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maen Abdel","family":"Nour","sequence":"additional","affiliation":[{"name":"Department of General Surgery, The Specialty Hospital , Amman ,","place":["Jordan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ismaiel Abu","family":"Mahfouz","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Al-Balqa Applied University , Al-Salt ,","place":["Jordan"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2026,8,12]]},"reference":[{"key":"2026081213573586100_ref1","doi-asserted-by":"crossref","first-page":"692","DOI":"10.1002\/1097-0142(197908)44:2<692::AID-CNCR2820440242>3.0.CO;2-6","article-title":"Multicystic, peritoneal mesothelioma: a report with electron microscopy of a case mimicking intra-abdominal cystic hygroma (lymphangioma)","volume":"44","author":"Mennemeyer","year":"1979","journal-title":"Cancer"},{"key":"2026081213573586100_ref2","doi-asserted-by":"crossref","first-page":"e2020159","DOI":"10.4322\/acr.2020.159","article-title":"Benign multicystic peritoneal mesothelioma \u2013 literature review and update","volume":"10","author":"Chand","year":"2020","journal-title":"Autops Case Rep"},{"key":"2026081213573586100_ref3","article-title":"Benign multicystic peritoneal mesothelioma within the retroperitoneum","volume":"3","author":"Grunvald","year":"2022","journal-title":"Am Coll Surg Case Rev"},{"key":"2026081213573586100_ref4","first-page":"e60664","article-title":"Intra-operative diagnosis of benign multicystic peritoneal mesothelioma: a case report of rare entity and lessons learned","volume":"16","author":"Wu","year":"2024","journal-title":"Cureus"},{"key":"2026081213573586100_ref5","first-page":"e15540","article-title":"Benign multicystic peritoneal mesothelioma presenting as a colonic 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