Tumors of the alimentary tract represent 5% of all cancers in dogs. While conducting tests 9 dogs were diagnosed with malignant cancer. Among those, 44.4% were fibrosarcoma, 33.3% squamousepithelial carcinoma and 22.3% melanoma. Lesions were located mainly on the gums' soft palate, tongue, buccal mucous membranes as well as in the sublingual areas. The initial diagnosis included exact clinical evaluation of how far the development of the tumor had advanced, the state of the lymph nodes, and histopathological tests were conducted as well. Radiological tests were conducted on the splanchnocranium bones evaluating the range of the cancer in the maxilla and mandible bones and X-rays of the chest were conducted to eliminate metastases. The most invasive tumor was melanoma. It often infiltrated the mucosal membranes of the oral cavity and metastasized to the splanchnocronium bones and cervical lymph nodes. After eliminating the presence of metastases, in recorded cases of fibrosarcoma and squamous epithelial carcinoma the preferred treatment was a radical removal of the cancer with surrounding tissue. In the cases where no metastases to the lymph nodes are found and the cancer has attacked the bones it is possible to perform a partial maxilectomy or mandibulectomy. When meastaseshas have occurred in both bones and lymph nodes the prognosis is very poor. The chances of a cure decrease and the remaining options are palliative therapy or euthanasia of the animal.
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