{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T13:08:02Z","timestamp":1788959282995,"version":"build-2803163510"},"reference-count":12,"publisher":"BMJ","issue":"9","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2026,8,30]]},"published-print":{"date-parts":[[2026,9]]},"abstract":"<jats:p>Rudimentary horn pregnancy is a rare form of ectopic pregnancy associated with M\u00fcllerian duct anomalies and carries a high risk of uterine rupture and life-threatening haemorrhage. We report the case of a woman in her 20s, gravida 2, abortion 1, who presented with 6\u2009weeks of amenorrhoea and a positive urine pregnancy test. Transvaginal ultrasonography demonstrated a 6-week 4-day gestational sac in the right adnexa with an empty uterine cavity, suggestive of an ectopic pregnancy. Diagnostic laparoscopy revealed a right rudimentary horn pregnancy, which was excised along with the ipsilateral fallopian tube. The postoperative course was uneventful, and histopathological examination confirmed gestational tissue within the rudimentary horn. This case highlights the diagnostic challenge of distinguishing rudimentary horn pregnancy from tubal ectopic pregnancy and emphasises the importance of early recognition and timely surgical management to prevent catastrophic rupture and haemorrhage.<\/jats:p>","DOI":"10.1136\/bcr-2026-273895","type":"journal-article","created":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T12:35:10Z","timestamp":1788957310000},"page":"e273895","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Rudimentary horn pregnancy mimicking tubal ectopic pregnancy: a diagnostic dilemma"],"prefix":"10.1136","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-8728-2815","authenticated-orcid":false,"given":"Heena N","family":"Rajput","sequence":"first","affiliation":[{"name":"Department of Obstetrics & Gynaecology, Sumandeep Vidyapeeth Deemed to be University, Vadodara, GJ, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-2797-2143","authenticated-orcid":false,"given":"Kishor P","family":"Chauhan","sequence":"additional","affiliation":[{"name":"Department of Obstetrics & Gynaecology, Sumandeep Vidyapeeth Deemed to be University, Vadodara, GJ, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-6651-2895","authenticated-orcid":false,"given":"Pamisa Prashant","family":"Hastak","sequence":"additional","affiliation":[{"name":"Department of Obstetrics & Gynaecology, Sumandeep Vidyapeeth Deemed to be University, Vadodara, GJ, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-0665-2460","authenticated-orcid":false,"given":"Sweta S","family":"Shrivastava","sequence":"additional","affiliation":[{"name":"Department of Obstetrics & Gynaecology, Sumandeep Vidyapeeth Deemed to be University, Vadodara, GJ, India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2026,9,9]]},"reference":[{"key":"2026090905350474000_19.9.e273895.1","doi-asserted-by":"crossref","first-page":"219","DOI":"10.7863\/jum.2005.24.2.219","article-title":"Rudimentary horn pregnancy: first-trimester prerupture sonographic diagnosis and confirmation by magnetic resonance imaging","volume":"24","author":"Tsafrir","year":"2005","journal-title":"J Ultrasound Med"},{"key":"2026090905350474000_19.9.e273895.2","doi-asserted-by":"crossref","first-page":"2341","DOI":"10.18203\/2320-1770.ijrcog20251989","article-title":"Non-communicating rudimentary horn of a unicornuate uterus: clinical spectrum and diagnostic challenges: a case series","volume":"14","author":"Utkalika","year":"2025","journal-title":"Int J Reprod Contracept Obstet Gynecol"},{"key":"2026090905350474000_19.9.e273895.3","doi-asserted-by":"crossref","first-page":"1153","DOI":"10.1046\/j.1600-0412.2003.00234.x","article-title":"Rudimentary uterine horn: management of a diagnostic enigma","volume":"82","author":"Chakravarti","year":"2003","journal-title":"Acta Obstet Gynecol Scand"},{"key":"2026090905350474000_19.9.e273895.4","doi-asserted-by":"crossref","unstructured":"Ji J , Tan L , Lv K . Imaging diagnosis of rudimentary horn pregnancy: a case report. AME Case Rep 2024;8. doi:10.21037\/acr-23-164","DOI":"10.21037\/acr-23-164"},{"key":"2026090905350474000_19.9.e273895.5","article-title":"Ruptured Ectopic Pregnancy in a Non-communicating Rudimentary Horn at 18 Weeks of Gestation","volume":"16","author":"Al Abbas","year":"2024","journal-title":"Cureus"},{"key":"2026090905350474000_19.9.e273895.6","article-title":"Ectopic pregnancy in non-communicating rudimentary uterine horn: a ticking bomb in a closed room","volume":"13","author":"Sharma","year":"2025","journal-title":"Int J Res Med Sci"},{"key":"2026090905350474000_19.9.e273895.7","article-title":"Pregnancy in Rudimentary Horn","volume":"15","author":"Gunjan","year":"2023","journal-title":"Cureus"},{"key":"2026090905350474000_19.9.e273895.8","doi-asserted-by":"crossref","first-page":"202","DOI":"10.33545\/gynae.2020.v4.i5d.702","article-title":"Conservative surgical management of a ruptured non-communicating rudimentary horn of pregnancy at 13 weeks period of gestation in previous caesarean delivery: A rare case report","volume":"4","author":"Yaliwal","year":"2020","journal-title":"Int J Clin Obstet Gynaecol"},{"key":"2026090905350474000_19.9.e273895.9","article-title":"Ectopic Pregnancy in a Non-communicating Rudimentary Uterine Horn: A Case of Successful Medical Management and Literature Review","volume":"16","author":"Harpey","year":"2024","journal-title":"Cureus"},{"key":"2026090905350474000_19.9.e273895.10","first-page":"463","article-title":"Ultrasonographic diagnosis and causes of misdiagnosis of rudimentary horn pregnancy","volume":"17","author":"Chunyu","year":"2020","journal-title":"Chin J Med Ultrasound (Electron Ed)"},{"key":"2026090905350474000_19.9.e273895.11","doi-asserted-by":"crossref","DOI":"10.3390\/diagnostics12030759","article-title":"Pregnancy in a Non-Communicating Rudimentary Horn of Unicornuate Uterus","volume":"12","author":"Ma","year":"2022","journal-title":"Diagnostics (Basel)"},{"key":"2026090905350474000_19.9.e273895.12","article-title":"Laparoscopic Management of a 12-Week Pregnancy Loss in a Rudimentary Uterine Horn","volume":"16","author":"Srinivas","year":"2024","journal-title":"Cureus"}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2026-273895","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T12:35:14Z","timestamp":1788957314000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2026-273895"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,9]]},"references-count":12,"journal-issue":{"issue":"9","published-online":{"date-parts":[[2026,9,9]]},"published-print":{"date-parts":[[2026,9]]}},"alternative-id":["10.1136\/bcr-2026-273895"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2026-273895","relation":{},"ISSN":["1757-790X"],"issn-type":[{"value":"1757-790X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,9]]}}}