Idiopathic lymphoplasmacytic rhinitis in 33 dogs

Area of Science:

• Veterinary Medicine
• Canine Health
• Immunology

Background:

• Idiopathic lymphoplasmacytic rhinitis (LPR) is a common nasal condition in dogs.
• Clinical signs of LPR often mimic other chronic nasal diseases, complicating diagnosis.

Purpose of the Study:

• To characterize clinical signs, diagnostic findings, and treatment responses in dogs with LPR.
• To evaluate the efficacy of different therapeutic approaches for canine LPR.

Main Methods:

• Retrospective study of 33 client-owned dogs diagnosed with idiopathic LPR.
• Evaluation of clinical signs, radiography, rhinoscopy, and histology.
• Analysis of treatment outcomes for corticosteroids, cyclosporine, and desensitization therapy.

Main Results:

• Idiopathic LPR constituted 30% of nasal disease diagnoses in the study period.
• Common signs included mucoid nasal discharge and bilateral stertor; radiography was often unremarkable.
• Histopathology confirmed lymphoplasmacytic infiltration; cultures were negative for pathogens.
• Desensitization therapy yielded the best response, followed by combined corticosteroids and cyclosporine.

Conclusions:

• Idiopathic LPR is a significant cause of chronic rhinitis in dogs.
• Diagnosis relies on clinical signs, rhinoscopy, and characteristic histopathology.
• Allergen-specific immunotherapy (desensitization) appears most effective, with corticosteroids and cyclosporine offering alternative treatment options.