{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,3]],"date-time":"2026-09-03T17:16:58Z","timestamp":1788455818385,"version":"build-2803163510"},"reference-count":20,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,9,3]],"date-time":"2026-09-03T00:00:00Z","timestamp":1788393600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Vet. Sci."],"abstract":"<jats:p>A 3.5-year-old, 5.2-kg mixed-breed dog was presented with persistent stranguria after being neutered due to dystocia 6 months ago. Plain abdominal radiographs revealed an intrapelvic soft-tissue attenuating mass that displaced the urinary bladder cranially and constricted the descending colon. Abdominal ultrasonography yielded inconclusive results. Computed tomography revealed the mass as a tubular, hypodense structure compressing the urethra and the descending colon. This finding was defined as hydrocolpos induced by an imperforate hymen, segmental vaginal aplasia, or a vestibulovaginal disorder. Vaginoscopy revealed vaginal atresia and a stem-shaped mass obscuring the ostium urethrae externum. Retrograde cystography showed a significantly dilated urethra behind the obscured ostium urethrae externum. A pedunculated mass (polyp) was suspected to hinder the urinary outflow. A minimal invasive resection of the polyp and widening of the urethra were performed. Normal micturition was observed for 2 months. In the 9th week, the patient returned with tenesmus. An invasive procedure involving episiotomy, evacuation of the hydrocolpos, and creation of a stoma between the mucous membrane of the hydrocolpos and the vaginal mucosa led to permanent resolution of the clinical signs. Only a few case reports exist regarding congenital hydrocolpos. As the history indicates, a traumatic origin is considered likely; therefore, we assume that this is the first case report of secondary, trauma-induced vaginal atresia, and the resulting hydrocolpos.<\/jats:p>","DOI":"10.3389\/fvets.2026.1910776","type":"journal-article","created":{"date-parts":[[2026,9,3]],"date-time":"2026-09-03T16:28:01Z","timestamp":1788452881000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Hydrocolpos in a mixed-breed dog: a case report"],"prefix":"10.3389","volume":"13","author":[{"given":"Christoph","family":"Leber","sequence":"first","affiliation":[{"name":"Valera Small Animal Clinic","place":["Berlin, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas","family":"Rohwedder","sequence":"additional","affiliation":[{"name":"Valera Small Animal Clinic","place":["Berlin, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sina","family":"Rehbein-Manchi","sequence":"additional","affiliation":[{"name":"Valera Small Animal Clinic","place":["Berlin, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2026,9,3]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"105230","DOI":"10.1016\/j.rvsc.2024.105230","article-title":"The most common congenital malformations in dogs: literature review and practical guide","volume":"171","author":"Estevam","year":"2024","journal-title":"Res Vet Sci."},{"key":"B2","doi-asserted-by":"publisher","first-page":"52","DOI":"10.1016\/j.theriogenology.2019.07.027","article-title":"Incidence of congenital malformations and impact on the mortality of neonatal canines","volume":"140","author":"Nobre Pacifico Pereira","year":"2019","journal-title":"Theriogenology."},{"key":"B3","doi-asserted-by":"publisher","first-page":"218","DOI":"10.1016\/j.anireprosci.2014.03.003","article-title":"Neonatal viability evaluation by Apgar score in puppies delivered by cesarean section in two brachycephalic breeds (English and French bulldog)","volume":"146","author":"Batista","year":"2014","journal-title":"Anim Reprod Sci."},{"key":"B4","doi-asserted-by":"publisher","first-page":"10439","DOI":"10.58292\/CT.v16.10439","article-title":"Sexual development disorder in a dog","volume":"16","author":"Wright","year":"2024","journal-title":"Case Rep."},{"key":"B5","doi-asserted-by":"publisher","first-page":"258","DOI":"10.1055\/b-0039-170374","article-title":"26 Entwicklung der Geschlechtsorgane","volume":"4","author":"Kressin","year":"2019","journal-title":"Embryologie der Haustiere."},{"key":"B6","volume-title":"Small Animal Theriogenology, Edited by Margaret V. Root Kustritz","author":"Nelson","year":"2003"},{"key":"B7","doi-asserted-by":"publisher","first-page":"1889","DOI":"10.2460\/javma.1996.209.11.1889","article-title":"Vestibulovaginal stenosis in dogs: 18 cases (1987-1995)","volume":"209","author":"Kyles","year":"1996","journal-title":"J Am Vet Med Assoc."},{"key":"B8","doi-asserted-by":"crossref","DOI":"10.1055\/b-006-166360","volume-title":"Spezielle Pathologie f\u00fcr die Tiermedizin","author":"Baumg\u00e4rtner","year":"2020"},{"key":"B9","doi-asserted-by":"publisher","first-page":"246","DOI":"10.17555\/ksvc.2014.06.31.3.246","article-title":"Kim T-h, Hong S, et al. Persistent hymen and pyocolpos in a female Shih-Tzu dog","volume":"31","author":"Kim","year":"2014","journal-title":"J Vet Clin."},{"key":"B10","doi-asserted-by":"publisher","first-page":"338","DOI":"10.1016\/j.theriogenology.2007.04.015","article-title":"Disorders of sexual development in the dog and cat","volume":"68","author":"Lyle","year":"2007","journal-title":"Theriogenology."},{"key":"B11","doi-asserted-by":"publisher","first-page":"404","DOI":"10.1111\/j.1748-5827.2003.tb00176.x","article-title":"Hydrocolpos in dogs: surgical treatment in two cases","volume":"44","author":"Viehoff","year":"2003","journal-title":"J Small Anim Pract."},{"key":"B12","doi-asserted-by":"publisher","first-page":"100576","DOI":"10.1016\/j.tcam.2021.100576","article-title":"Treatment of a congenital imperforate vestibulovaginal junction and secondary hydrocolpos with endoscopic laser ablation in two dogs","volume":"45","author":"Palm","year":"2021","journal-title":"Top Companion Anim Med."},{"key":"B13","doi-asserted-by":"publisher","first-page":"56","DOI":"10.2460\/javma.1995.206.01.56","article-title":"Vaginal septa in dogs: 15 cases (1983-1992)","volume":"206","author":"Root","year":"1995","journal-title":"J Am Vet Med Assoc."},{"key":"B14","first-page":"281","article-title":"Segmental aplasia of the M\u00fcllerian duct system in a dog","volume":"18","author":"Gee","year":"1977","journal-title":"Can Vet J."},{"key":"B15","doi-asserted-by":"publisher","first-page":"8067967","DOI":"10.1155\/2016\/8067967","article-title":"Perineal protrusion secondary to imperforate hymen and hydrocolpos in an 8-year-old spayed female dog","volume":"2016","author":"Blackford Winders","year":"2016","journal-title":"Case Rep Vet Med."},{"key":"B16","doi-asserted-by":"publisher","first-page":"475","DOI":"10.1292\/jvms.63.475","article-title":"A case of a bitch with imperforate hymen and hydrocolpos","volume":"63","author":"Tsumagari","year":"2001","journal-title":"J Vet Med Sci."},{"key":"B17","doi-asserted-by":"publisher","first-page":"384","DOI":"10.5455\/javar.2020.g432","article-title":"Diagnosis and surgical treatment of bilateral ureteral calculi, hydronephrosis, pyometra, pyocolpos, vestibulovaginal stenosis, and imperforate hymen in a dog: a rare critical case report","volume":"7","author":"Kim","year":"2020","journal-title":"J Adv Vet Anim Res."},{"key":"B18","doi-asserted-by":"publisher","first-page":"514","DOI":"10.1111\/rda.12491","article-title":"Congenital abnormality of the vagina complicated by haemato-pyocolpos in a 1-year labrador retriever","volume":"50","author":"Alonge","year":"2015","journal-title":"Reprod Domest Anim."},{"key":"B19","doi-asserted-by":"publisher","first-page":"2223","DOI":"10.25107\/2474-1655.2223","article-title":"A woman with a hematocolpos five months postpartum","volume":"7","author":"Madder","year":"2022","journal-title":"Ann Clin Case Rep."},{"key":"B20","first-page":"20","article-title":"Surgical management of fibroepithelial polyps of the vagina in a bitch","volume":"5","author":"Maiti","year":"2020","journal-title":"EC Vet Sci"}],"container-title":["Frontiers in Veterinary Science"],"original-title":[],"link":[{"URL":"https:\/\/www.frontiersin.org\/articles\/10.3389\/fvets.2026.1910776\/full","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,9,3]],"date-time":"2026-09-03T16:28:03Z","timestamp":1788452883000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.frontiersin.org\/articles\/10.3389\/fvets.2026.1910776\/full"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,9,3]]},"references-count":20,"alternative-id":["10.3389\/fvets.2026.1910776"],"URL":"https:\/\/doi.org\/10.3389\/fvets.2026.1910776","relation":{},"ISSN":["2297-1769"],"issn-type":[{"value":"2297-1769","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,9,3]]},"article-number":"1910776"}}