Diffuse Osteosclerosis in a Young Cat Presenting With Chronic Nasal Congestion: A Case Report

Area of Science:

• Veterinary Internal Medicine
• Comparative Pathology
• Feline Medicine

Background:

• Chronic upper airway congestion is a frequent feline issue, often linked to acquired conditions like rhinitis or neoplasia.
• Diffuse osteosclerosis is a poorly understood bone disorder in cats, with limited documented cases.
• This condition presents a diagnostic challenge, differing from common causes of nasal congestion.

Observation:

• A 5-year-old domestic medium-hair cat presented with upper respiratory signs and limb pain.
• Computed tomography (CT) revealed diffuse osteosclerosis, characterized by thickened nasal turbinates causing near-complete nasal passage occlusion.
• Diagnostic tests excluded infectious or neoplastic etiologies for the observed bone pathology.

Findings:

• The feline patient exhibited diffuse osteosclerosis, a systemic bone pathology manifesting as severe osseous thickening.
• Imaging findings indicated near-occlusion of nasal passages due to thickened turbinates, leading to chronic upper airway congestion.
• The clinical presentation shares similarities with autosomal dominant osteopetrosis type 1 in humans.

Implications:

• This case expands the understanding of feline upper airway obstruction causes, linking it to systemic bone disease.
• The findings suggest a potential parallel between feline osteosclerosis and human osteopetrosis, warranting further comparative research.
• Supportive care, including pain management and corticosteroids, was employed due to the lack of targeted treatments for reversing osseous changes.