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Factors affecting the long-term outcomes of surgery for oral tumours in dogs

B. N. Sarowitz, G. J. Davis, S. Kim

IN dogs, tumours of the oral cavity represent five to seven per cent of all tumours diagnosed. The treatment of choice for most oral masses is complete surgical excision to remove all local disease, with the probability of recurrence related to the ability to remove the entire mass. Biological behaviour varies considerably with tumour type, and adjunctive therapy is often recommended following surgery based on the probability of local tumour recurrence and/or distant metastasis.

This study aimed to describe the long-term outcomes and prognostic factors associated with curative-intent surgery for the most common oral tumours in dogs.

A retrospective review of the records of 234 dogs with oral tumours treated with curative-intent surgery was carried out. Data collected included signalment, weight, surgical procedure, lymph node staging results, CT results, tumour size, histopathology results including margin evaluation, complications, adjunctive therapies, local recurrence or metastasis, date and cause of death and owner satisfaction.

Malignant melanoma was the most common malignant oral tumour (17.1 per cent) and had the shortest median cause-specific survival (206 days), followed by osteosarcoma (209 days). The local …

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