{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T14:10:03Z","timestamp":1790259003062,"version":"4.1.0"},"reference-count":9,"publisher":"BMJ","issue":"9","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2026,9,10]]},"published-print":{"date-parts":[[2026,9]]},"abstract":"<jats:p>A woman in her 20s presented with severe progressive dysmenorrhoea that began within 1\u20132 years of menarche, was refractory to medical therapy and required repeated emergency department visits for parenteral analgesia. Ultrasonography suggested a uterine leiomyoma, whereas MRI demonstrated a unilateral haemorrhagic cavitated intramyometrial lesion without communication with the endometrial cavity, raising suspicion for a non-communicating M\u00fcllerian anomaly. Diagnostic laparoscopy revealed a small cavitated intramyometrial mass beneath the right round ligament with minimal pelvic endometriosis. Complete laparoscopic excision was performed while preserving the endometrial cavity. Histopathological examination confirmed an accessory cavitated uterine mass. The patient experienced complete resolution of dysmenorrhoea and remained asymptomatic at 6-month follow-up.<\/jats:p>","DOI":"10.1136\/bcr-2026-275664","type":"journal-article","created":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T13:55:17Z","timestamp":1790258117000},"page":"e275664","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Accessory cavitated uterine mass presenting as refractory dysmenorrhoea: a diagnostic challenge"],"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, 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, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-9577-7811","authenticated-orcid":false,"given":"Shruti Ashvinbhai","family":"Naria","sequence":"additional","affiliation":[{"name":"Department of Obstetrics & Gynaecology, Sumandeep Vidyapeeth Deemed to be University, Vadodara, 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, India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2026,9,24]]},"reference":[{"key":"2026092406551343000_19.9.e275664.1","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0b013e3181f7e735"},{"key":"2026092406551343000_19.9.e275664.2","doi-asserted-by":"crossref","first-page":"1238","DOI":"10.1016\/j.fertnstert.2021.09.025","article-title":"ASRM m\u00fcllerian anomalies classification 2021","volume":"116","author":"Pfeifer","year":"2021","journal-title":"Fertil Steril"},{"key":"2026092406551343000_19.9.e275664.3","doi-asserted-by":"crossref","first-page":"1036","DOI":"10.1111\/aogs.14801","article-title":"Accessory cavitated uterine malformation (ACUM): A scoping review","volume":"103","author":"Timmerman","year":"2024","journal-title":"Acta Obstet Gynecol Scand"},{"key":"2026092406551343000_19.9.e275664.4","doi-asserted-by":"crossref","first-page":"821","DOI":"10.1002\/uog.22173","article-title":"Imaging in gynecological disease (21): clinical and ultrasound characteristics of accessory cavitated uterine malformations","volume":"57","author":"Naftalin","year":"2021","journal-title":"Ultrasound Obstet Gynecol"},{"key":"2026092406551343000_19.9.e275664.5","doi-asserted-by":"crossref","unstructured":"Dekkiche S , Dubruc E , Kanbar M , et al . 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