Veterinary Society of
Surgical Oncology

Biologic Behaviour

  • tonsillar SCC associated with environmental pollution as 10-times more common in urban areas
  • tonsillar SCC are usually plaque or cauliflower lesions involving 1 tonsil
  • cervical lymphadenopathy is a common signs (ipsilateral, contralateral, or bilateral)
  • metastasis to the regional lymph node in 98% and lungs in 63% dogs
  • other tonsillar tumors:
  • LSA (usually bilateral and associated with generalized lymphadenopathy)
  • malignant melanoma (metastatic or primary)


  • surgery: tonsillectomy is rarely curative
  • radiation therapy: 75% control of local disease
  • chemotherapy is usually ineffective, but piroxicam, cisplatin, and bleomycin have been used with limited success


  • 12-month survival rate < 10%
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