Digital papillomatosis in a confined Beagle

Area of Science:

• Veterinary Dermatology
• Viral Pathology
• Canine Infectious Diseases

Background:

• Papillomaviruses are common causes of benign epithelial tumors in various animal species.
• Cutaneous papillomas in dogs can present with diverse clinical and histopathological features.
• Understanding viral inclusions aids in diagnosing and characterizing papillomavirus infections.

Observation:

• A young Beagle presented with multiple papillomas affecting all four feet digits.
• No concurrent oral or other cutaneous lesions were noted.
• Immunoperoxidase staining confirmed papillomavirus antigen within keratinocyte nuclei.

Findings:

• Papillomas exhibited typical intranuclear inclusions and unique eosinophilic cytoplasmic inclusions.
• These cytoplasmic inclusions were previously documented in a Boxer with similar viral lesions.
• Complete regression of all papillomas occurred within two months.

Implications:

• The findings contribute to the understanding of papillomavirus pathogenesis in dogs.
• The presence of eosinophilic cytoplasmic inclusions may be a characteristic feature in some canine papillomavirus cases.
• Spontaneous regression suggests a role for the host immune response in controlling the infection.