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This case report highlights the rare occurrence of a unilateral uterine horn torsion in a bicornuate uterus caused by a massive subserosal leiomyoma. Surgical intervention with myomectomy revealed a previously undiagnosed bicornuate uterus, and the patient\u2019s recovery was uneventful. This finding shows the need for clinicians to consider leiomyoma torsion as well as uterine horn torsion in their differential diagnosis of acute abdominal pain.<\/jats:p>","DOI":"10.1136\/bcr-2024-264361","type":"journal-article","created":{"date-parts":[[2025,3,26]],"date-time":"2025-03-26T02:21:46Z","timestamp":1742955706000},"page":"e264361","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":1,"title":["Bilateral massive leiomyomas in a bicornuate uterus, with torsion of the right horn"],"prefix":"10.1136","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0596-1316","authenticated-orcid":false,"given":"Valerie","family":"O\u2019Besso","sequence":"first","affiliation":[{"name":"Obstetrics and Gynecology, Maimonides Medical Center, Brooklyn, New York, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Adi","family":"Borovich","sequence":"additional","affiliation":[{"name":"Obstetrics and Gynecology, Maimonides Medical Center, Brooklyn, New York, USA"},{"name":"Rabin Medical Center, Petah Tikva, Central, Israel"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Scott","family":"Chudnoff","sequence":"additional","affiliation":[{"name":"Obstetrics and Gynecology, Maimonides Medical Center, Brooklyn, New York, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Justin","family":"To","sequence":"additional","affiliation":[{"name":"Obstetrics and Gynecology, Maimonides Medical Center, Brooklyn, New York, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2025,3,25]]},"reference":[{"key":"2025082703544793000_18.3.e264361.1","doi-asserted-by":"crossref","first-page":"678","DOI":"10.1210\/endrev\/bnab039","article-title":"Comprehensive Review of Uterine Fibroids: Developmental Origin, Pathogenesis, and Treatment","volume":"43","author":"Yang","year":"2022","journal-title":"Endocr Rev"},{"key":"2025082703544793000_18.3.e264361.2","doi-asserted-by":"crossref","first-page":"300","DOI":"10.1016\/j.tjog.2018.02.021","article-title":"Torsion of pedunculated subserous uterine leiomyoma: A rare complication of a common disease","volume":"57","author":"Lai","year":"2018","journal-title":"Taiwan J Obstet Gynecol"},{"key":"2025082703544793000_18.3.e264361.3","doi-asserted-by":"crossref","DOI":"10.1016\/j.ijscr.2024.110248","article-title":"Symptomatic leiomyoma in a patient with a bicornuate uterus: A rare case report","volume":"123","author":"Mwidibo","year":"2024","journal-title":"Int J Surg Case Rep"},{"key":"2025082703544793000_18.3.e264361.4","doi-asserted-by":"crossref","unstructured":"Chundawat R , Rastogi R , Tak A . Torsion of gravid horn of bicornuate uterus: a rare case report. Int J Reprod Contracept Obstet Gynecol 2016;2428\u201330. doi:10.18203\/2320-1770.ijrcog20162141","DOI":"10.18203\/2320-1770.ijrcog20162141"},{"key":"2025082703544793000_18.3.e264361.5","doi-asserted-by":"crossref","first-page":"144","DOI":"10.1016\/j.radcr.2019.11.001","article-title":"Imaging findings of a torsed pedunculated uterine leiomyoma: A case report","volume":"15","author":"Le","year":"2020","journal-title":"Radiol Case Rep"},{"key":"2025082703544793000_18.3.e264361.6","article-title":"Torsion of a huge subserosal uterine leiomyoma: A challenging case of acute abdomen","volume":"27","author":"Dhillon","year":"2023","journal-title":"SA J Radiol"},{"key":"2025082703544793000_18.3.e264361.7","doi-asserted-by":"crossref","first-page":"101911","DOI":"10.1016\/j.jogoh.2020.101911","article-title":"VNOTES (Vaginal Natural Orifices Transluminal Endoscopic Surgery) myomectomy through anterior cul-de-sac approach on the bicornuate uterus","volume":"50","author":"Badiglian-Filho","year":"2021","journal-title":"J Gynecol Obstet Hum Reprod"},{"key":"2025082703544793000_18.3.e264361.8","unstructured":"Kaur P , Panneerselvam D . Bicornuate uterus. Treasure Island (FL): StatPearls Publishing, 2021."},{"key":"2025082703544793000_18.3.e264361.9","doi-asserted-by":"crossref","first-page":"e100","DOI":"10.1097\/AOG.0000000000004401","article-title":"Management of Symptomatic Uterine Leiomyomas","volume":"137","year":"2021","journal-title":"Obstetr Gynecol"}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2024-264361","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T10:54:54Z","timestamp":1756292094000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2024-264361"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,3]]},"references-count":9,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2025,3,25]]},"published-print":{"date-parts":[[2025,3]]}},"alternative-id":["10.1136\/bcr-2024-264361"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2024-264361","relation":{},"ISSN":["1757-790X"],"issn-type":[{"type":"electronic","value":"1757-790X"}],"subject":[],"published":{"date-parts":[[2025,3]]}}}