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Balloon dilation of a urethral stricture caused by a congenital obstructive proximal urethral membrane (COPUM) in a dog
  1. Darren Kelly,
  2. Ingrid Isaac,
  3. Judith Cruzado-Perez and
  4. Florence Juvet
  1. Internal Medicine Service, Southern Counties Veterinary Specialists LLP, Ringwood, UK
  1. Correspondence to Darren Kelly; darren.kelly.2{at}


Congenital urethral strictures are well recognised in human beings and have recently been described in two cats but have not been previously reported in dogs. A 10-month-old female English Bull Terrier presented with a life-long history of being unable to pass a normal stream of urine. Urethrocystoscopy confirmed the presence of a stricture lesion in the proximal urethra. This thin, membranous structure was effaced under endoscopic visualisation using a 10 mm diameter balloon-dilation catheter. Complete and sustained resolution of clinical signs occurred after a single dilation procedure. To the best of our knowledge, this is the first report of a congenital urethral stricture in a dog and the term congenital obstructive proximal urethral membrane may be useful for describing these lesions in the future.

  • urethra
  • obstruction
  • canine
  • Cystoscopy
  • urethrocystoscopy
  • bladder
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  • Contributors All authors met the criteria for inclusion as authors.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Data availability statement Data are available in a public, open access repository.

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