A case of a highly invasive carcinoma of a salivary gland in a crossbred dog.

A 13-year-old male crossbred dog was presented with a unilateral swelling of the facial region, severe pain when the mouth was opened, and chronic otitis. Upon palpation it appeared that the right mandible had been fractured. At necropsy the head revealed a large tumour which had invaded the mandible and had caused areas of osteolysis. Histopathology revealed a solid highly anaplastic carcinoma of one of the serous salivary glands.