Rib metastases from a non-tonsillar squamous cell carcinoma in a dog.

Area of Science:

• Veterinary Oncology
• Comparative Pathology

Background:

• Oral squamous cell carcinoma (SCC) is a common malignancy in dogs.
• Metastatic potential varies significantly based on tumor location and type.
• Oropharyngeal SCC, particularly non-tonsillar SCC, has a less predictable metastatic behavior.

Observation:

• A 15-year-old Irish setter presented with a rapidly growing oral SCC.
• Radiographs revealed bony lesions on the ribs and costal cartilages.
• Histopathology confirmed the rib lesions as metastatic SCC.

Findings:

• This case represents metastatic spread of oral SCC to the ribs in a canine patient.
• The metastatic SCC originated from a non-tonsillar oral tumor.
• Literature review supports the occurrence of bone metastasis from non-tonsillar SCC.

Implications:

• Metastatic bone disease can occur secondary to oral SCC in dogs.
• Understanding metastatic patterns is crucial for accurate prognosis.
• This case may inform treatment strategies and prognostic assessments for similar future cases.