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  • Title: Outcomes following balloon dilation for management of urethral obstruction secondary to urothelial carcinoma in dogs: 12 cases (2010-2015).
    Author: Kim S, Hosoya K, Takagi S, Okumura M.
    Journal: J Am Vet Med Assoc; 2019 Aug 01; 255(3):330-335. PubMed ID: 31298635.
    Abstract:
    OBJECTIVE: To describe outcomes for dogs that underwent balloon dilation for palliative treatment of urethral obstruction caused by urothelial carcinoma. ANIMALS: 12 client-owned dogs. PROCEDURES: Medical records were searched to identify dogs with urothelial (bladder, urethra, or prostate) carcinoma that underwent balloon dilation for treatment of urethral obstruction between April 2010 and December 2015. Information regarding history, signalment, clinical signs, diagnostic imaging findings, balloon dilation technique, clinical outcomes, complications, and additional treatments was obtained by review of medical records. RESULTS: Improvement in clinical signs of urethral obstruction was observed after the initial dilation procedure for 9 of 12 dogs. Urethral obstruction was known to recur in 5 dogs 48 to 296 days after the initial procedure. Three of these dogs underwent a second dilation procedure, with clinical improvement in all 3 dogs for 41 to 70 days. One of 2 dogs that had a third procedure after the second reobstruction had clinical improvement in urinary tract signs until subsequent death from metastatic disease 22 days later. Complications included hematuria, urinary incontinence, and dysuria; these resolved within a few days after treatment. CONCLUSIONS AND CLINICAL RELEVANCE: Urethral balloon dilation was a minimally invasive procedure that provided relief of urethral obstruction from urothelial carcinoma in most dogs of the study population. Prospective studies are needed to identify optimal techniques for balloon dilation in dogs with neoplastic urethral obstructions and to identify patients that are likely to benefit most from the treatment.
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