Lingual Chondrolipoma in a Dog

Area of Science:

• Veterinary Pathology
• Canine Oncology
• Oral Tumors in Animals

Background:

• Tumors of the tongue can cause significant morbidity in dogs.
• Chondrolipomas are rare tumors composed of adipose and cartilaginous tissue.
• Primary oral tumors in dogs require accurate diagnosis for appropriate management.

Observation:

• A 13-year-old female Yorkshire terrier presented with dysphagia due to a rapidly growing lingual mass.
• Gross examination revealed a 0.8 cm mass in the lingual frenulum.
• Histopathology showed an unencapsulated tumor with mature adipose and cartilaginous tissue.

Findings:

• Immunohistochemistry confirmed vimentin and S100 protein expression in tumor cells.
• SOX9 positivity was observed in chondroid and spindle cells.
• The tumor was diagnosed as a chondrolipoma, the first reported case in a dog's lingual frenulum.

Implications:

• This case expands the known anatomical locations for canine chondrolipomas.
• Accurate diagnosis of lingual masses is crucial for effective treatment planning in veterinary medicine.
• Further research may elucidate the specific etiology and behavior of lingual chondrolipomas in dogs.