Felis ISSN 2398-2950

Bladder: diverticulum

Synonym(s): Vesicourachal diverticulum

Contributor(s): Danielle Gunn-Moore, Ed Hall

Introduction

  • Vestigial outpouching of bladder wall at urachal attachment; may be incidental surgical or radiographic finding.
  • Signs: asymptomatic.
  • Diagnosis: positive contrast cystography (without distending the bladder).
  • Treatment: usually none.
  • Prognosis: predisposes to chronic urinary tract infection Cystitis: bacterial (UTI) and urolithiasis Urolithiasis.

Pathogenesis

Etiology

  • Urachus allows communication between urinary bladder and allantoic sac in fetus.
  • At birth urachus is non-functional and all urine flows through urethra in normal animals.
  • Two clinical syndromes:

Specific

Pathophysiology

  • Vestigial outpouching of bladder wall at urachal attachment.
  • Diverticulum   →   failure to void all urine from bladder   →   development of UTI   →   scarring of bladder wall   →   increased risk of UTI.
  • Pressure changes caused by LUTD may make diverticulum apparent.

Timecourse

  • Months to years.

Diagnosis

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Treatment

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Outcomes

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Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Osborne C A, Kroll R A, Lulich J P et al (1989) Medical management of vesicourachal diverticulae in 15 cats with lower urinary tract disease. JSAP 30 (11), 608-612 Wiley Online Library.


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