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Related Experiment Videos

Primary urethral tumors in dogs.

G Tarvin, A Patnaik, R Greene

    Journal of the American Veterinary Medical Association
    |April 15, 1978
    PubMed
    Summary

    Primary urethral tumors in dogs are most common in older females, presenting with hematuria and stranguria. Squamous cell carcinoma was the most frequent type, with surgical approach recommendations considering metastasis.

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    Area of Science:

    • Veterinary Medicine
    • Canine Oncology
    • Urologic Pathology

    Background:

    • Urethral tumors are rare in dogs, necessitating a review of clinical and pathological findings.
    • Understanding the epidemiology and clinical presentation of these tumors is crucial for diagnosis and treatment.

    Purpose of the Study:

    • To review cases of primary urethral tumors in dogs.
    • To identify common tumor types, clinical signs, and diagnostic methods.
    • To provide recommendations for surgical treatment based on findings.

    Main Methods:

    • Retrospective review of 20 canine cases with primary urethral tumors at The Animal Medical Center over a 6-year period.
    • Analysis of signalment, clinical signs, diagnostic imaging (including pneumocystography-cystography and voiding urethrography), histopathological findings, and metastasis.
    • Evaluation of treatment outcomes and surgical approach recommendations.

    Main Results:

    • Twenty cases of primary urethral tumors were identified, predominantly in older female dogs (average age 10.4 years).
    • Hematuria and stranguria were the most common clinical signs.
    • Squamous cell carcinoma was the most prevalent tumor type (12/20), followed by transitional cell carcinoma, adenocarcinoma, hemangiosarcoma, and embryonic rhabdomyosarcoma.
    • Pneumocystography-cystography with voiding urethrography was the most useful diagnostic method.
    • Metastasis to regional lymph nodes or diffuse tumor extent was observed in 6 of 20 dogs.

    Conclusions:

    • Primary urethral tumors in dogs, particularly squamous cell carcinoma, occur most frequently in older females.
    • Early and accurate diagnosis is aided by specific imaging techniques.
    • Surgical excision, if attempted, should consider a caudal abdominal approach due to the potential for metastasis and diffuse tumor infiltration.

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