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Bilateral pigmented villonodular synovitis in a dog

¹College of Veterinary Medicine, North Carolina State University, Raleign 27606, USA.

The Journal of Small Animal Practice

|June 1, 1997

Summary

Villonodular synovitis, a rare canine condition, was treated with surgery and corticosteroids. This approach led to significant clinical improvement and no recurrence of signs in a dog.

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Area of Science:

Veterinary Medicine
Canine Pathology
Surgical Oncology

Background:

Villonodular synovitis is an exceptionally rare condition affecting the synovial membrane in dogs.
This case report details a 10-year-old crossbreed presenting with progressive, bilateral hindlimb lameness and stifle joint swelling.

Observation:

Radiographs revealed extensive intra-articular soft tissue proliferation without bony changes.
Exploratory arthrotomy showed a significantly thickened, proliferative synovial membrane in the affected stifle joint.

Findings:

Histopathological diagnosis confirmed chronic active villonodular synovitis.
Surgical synovectomy followed by a six-week course of corticosteroid treatment resulted in marked clinical improvement.

Implications:

This case highlights successful management of canine villonodular synovitis through a combination of surgical intervention and corticosteroid therapy.
The findings suggest a favorable prognosis with this treatment protocol, even in severe presentations.

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