Canine Brain Tumors

In dogs, meningiomas and gliomas appear to occur most frequently. Most primary brain tumors are solitary, but multiple primary brain tumors have been reported. Secondary or metastatic tumors appear to be less common and may result from local extension (e.g. nasal adenocarcinoma) or metastases from primary tumors elsewhere. Skull tumors may affect the brain by local extension. Although brain tumors occur in dogs of all breeds, either sex, and any age, the incidence increases over 5 years of age, and with certain breeds. Glial cell tumors and pituitary tumors occur commonly in brachycephalic breeds, whereas meningiomas occur most frequently in dolichocephalic breeds.