Clinical, imaging and histopathological features of concurrent malignancies in a dog: Meningoencephalitis of unknown origin and a malignant parotid gland carcinoma

Parotid gland tumours are rare in dogs. In this report, a 7-year-old, female, spayed bearded collie was presented for subacute onset of neurological signs. A meningoencephalitis unknown origin affecting the cerebellum diagnosed 10 months before had successfully been treated with prednisolone and mycophenolate mofetil. Head CT MRI showed right-sided retropharyngeal mass invading caudal fossa compressing brainstem, adjacent to second lesion involving right parotid gland. Postmortem examination revealed malignant carcinoma intracranial extension, occipital bone infiltration metastasis lungs medial lymph node. The unremarkable. This is first report describing detailed imaging features developed dog previously origin.