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This strengthens the theory of metaplasia, under the effect of oestrogen and accelerated by the hyperoestrogenic state of pregnancy as the most likely postulate for our patient. Although the uterus-like mass is not commonly reported, it should be considered as a possible differential for pelvic masses.<\/jats:p>","DOI":"10.1136\/bcr-2023-258757","type":"journal-article","created":{"date-parts":[[2024,2,29]],"date-time":"2024-02-29T12:00:56Z","timestamp":1709208056000},"page":"e258757","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Retroperitoneal \u2018uterus-like mass\u2019 of cervical origin"],"prefix":"10.1136","volume":"17","author":[{"given":"Nouran","family":"Karim","sequence":"first","affiliation":[{"name":"Gynaecology, Beacon Hospital, Dublin, Ireland"},{"name":"Gynaecology, University College Dublin (UCD), Dublin, Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Patricia","family":"Pantilie","sequence":"additional","affiliation":[{"name":"Gynaecology, Beacon Hospital, Dublin, Ireland"},{"name":"Gynaecology, University College Dublin (UCD), Dublin, Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Waseem","family":"Kamran","sequence":"additional","affiliation":[{"name":"Gynaecology, Beacon Hospital, Dublin, Ireland"},{"name":"Gynaecology, University College Dublin (UCD), Dublin, Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2024,2,29]]},"reference":[{"key":"2025082722152452000_17.2.e258757.1","first-page":"508","article-title":"Uterus-like mass replacing ovary: report of a new entity","volume":"105","author":"Cozzutto","year":"1981","journal-title":"Arch Pathol Lab Med"},{"key":"2025082722152452000_17.2.e258757.2","doi-asserted-by":"crossref","DOI":"10.1097\/MD.0000000000004961","article-title":"Uterus-like mass: uterus-like mass: a very rare and elusive entity a case report","volume":"95","author":"He","year":"2016","journal-title":"Medicine (Baltimore)"},{"key":"2025082722152452000_17.2.e258757.3","doi-asserted-by":"crossref","first-page":"1031","DOI":"10.1016\/j.asjsur.2020.06.007","article-title":"Uterus-like mass: a rare cystic lesion of small intestine","volume":"43","author":"Hsieh","year":"2020","journal-title":"Asian J Surg"},{"key":"2025082722152452000_17.2.e258757.4","doi-asserted-by":"publisher","DOI":"10.1097\/00000478-199803000-00008"},{"key":"2025082722152452000_17.2.e258757.5","doi-asserted-by":"publisher","DOI":"10.1097\/01.pgp.0000165171.00642.d1"},{"key":"2025082722152452000_17.2.e258757.6","doi-asserted-by":"crossref","first-page":"1041","DOI":"10.5858\/2005-129-1041-UMWFOA","article-title":"Uterine-like mass with features of an extrauterine adenomyoma presenting 22 years after total abdominal hysterectomy\u2013bilateral salpingo-oophorectomy: a case report and review of the literature","volume":"129","author":"Redman","year":"2005","journal-title":"Arch Pathol Lab Med"},{"key":"2025082722152452000_17.2.e258757.7","first-page":"505","article-title":"Smooth-muscle differentiation in genital tract disorders","volume":"105","author":"Scully","year":"1981","journal-title":"Arch Pathol Lab Med"},{"key":"2025082722152452000_17.2.e258757.8","doi-asserted-by":"publisher","DOI":"10.1177\/1066896913501385"},{"key":"2025082722152452000_17.2.e258757.9","first-page":"361","article-title":"Uteruslike mass of the ovary: endomyometriosis or congenital malformation? 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