Idiopathic lymphoplasmacytic rhinitis in dogs: 37 cases (1997-2002).
OBJECTIVE
To determine clinical signs and rhinoscopic, computed tomographic, and histologic abnormalities in dogs with idiopathic lymphoplasmacytic rhinitis.


METHODS
Retrospective case series.


METHODS
37 dogs.


METHODS
Clinical information was obtained from medical records. Nasal computed tomographic images and histologic slides of biopsy specimens were reviewed.


RESULTS
Dogs ranged from 1.5 to 14 years old (mean, 8 years); most (28) were large-breed dogs. Nasal discharge was unilateral in 11 of 26 (42%) dogs and bilateral in 15 of 26 (58%) dogs. In dogs with unilateral disease, duration of clinical signs ranged from 1.5 to 36 months (mean, 8.25 months; median, 2 months), and in dogs with bilateral disease, duration of signs ranged from 1.25 to 30 months (mean, 6.5 months; median, 4 months). Computed tomography (n = 33) most often revealed fluid accumulation (27/33 [82%]), turbinate destruction (23/33 [70%]), and frontal sinus opacification (14/33 [42%]). Rhinoscopy (n = 37) commonly demonstrated increased mucus and epithelial inflammation; turbinate destruction was detected in 8 of 37 (22%) dogs. Bilateral biopsy specimens from all 37 dogs were examined. Four dogs had only unilateral inflammatory changes. The remaining 33 dogs had bilateral lesions; in 20, lesions were more severe on 1 side than the other.


CONCLUSIONS
Findings suggest that idiopathic lymphoplasmacytic rhinitis is a key contributor to chronic nasal disease in dogs and may be more common than previously believed. In addition, findings suggest that idiopathic lymphoplasmacytic rhinitis is most often a bilateral disease, even among dogs with unilateral nasal discharge.
Windsor
Rebecca C
RC
Veterinary Medicine Teaching Hospital, School of Veterinary Medicine, University of California, Davis, CA 95616, USA.
Johnson
Lynelle R
LR
Herrgesell
Eric J
EJ
De Cock
Hilde E V
HE
D000818:Animals; D001706:Biopsy / Q000662:veterinary; D004283:Dog Diseases / Q000175:diagnosis / Q000473:pathology*; D004285:Dogs; D004724:Endoscopy / Q000662:veterinary; D005260:Female; D008297:Male; D009297:Nasal Mucosa / Q000166:cytology / Q000473:pathology*; D012189:Retrospective Studies; D012220:Rhinitis / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary*; D014057:Tomography, X-Ray Computed / Q000662:veterinary