Urogenital Hypoplasia and X Chromosome Monosomy in a Draft Horse Filly

Kirsten Hahn, Theresa M. Conze, Bettina Wollanke, Ottmar Distl, Lutz S. Goehring, Tanja S. Witte

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


A 5-month-old draft horse filly was presented with incontinence and severe perivulvar dermatitis, which developed during the previous 2 months. Left-sided ectopic ureter entering in the caudal vaginal lumen, signs of cervix hypoplasia, and urine accumulation in the uterus were found during initial vaginal endoscopy. Therefore, a left ureter-nephrectomy was conducted under general anesthesia. Additionally, a cytogenetic examination was performed, which showed a XO monosomy with a 63,X/64,XX mosaic. This is the first case report presenting a chromosome abnormality in a draft horse filly combined with a left-sided ectopic ureter. Cytogenetic evaluation is recommended in any female horse with developmental abnormalities of the cervix, uterus, ovaries, or with irregularities of estrus.

Original languageEnglish
Article number103318
JournalJournal of Equine Veterinary Science
StatePublished - Jan 2021

Bibliographical note

Publisher Copyright:
© 2020 Elsevier Inc.


  • Ectopic ureter
  • Equine Turner syndrome
  • Monosomy X
  • Perivulvar dermatitis
  • Urinary incontinence

ASJC Scopus subject areas

  • Equine


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