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Oral Cancer. Tumors of the mouth and throat (oropharyngeal tumors) are common in dogs and include malignant melanoma (the most common canine oral tumor), fibrosarcoma, squamous cell carcinoma and epulides.
Types of oral cancer. Squamous cell carcinoma: More than 90% of cancers that occur in the oral cavity and oropharynx are squamous cell carcinoma. Normally, the throat and mouth are lined with so-called squamous cells, which are flat and arranged in a scale-like way. Squamous cell carcinoma means that some squamous cells are abnormal. Verrucous carcinoma: About 5% of all oral cavity tumors are verrucous carcinoma, which is a type of very slow-growing cancer made up of squamous cells.