tumors are not common. They tend to occur in middle-aged and older dogs. The highest incidence is found in the short-nosed
breeds that have large-domed heads, including the Boxer, Bulldog, and Boston
Terrier. Tumors that can metastasize to the brain include cancers of the
mammary glands, prostate, and lungs, as well as hemangiosarcoma.
Symptoms depend on the tumor’s location and rate of growth. Tumors in the
cerebrum produce seizures and/or behavioral changes. The dog may exhibit
a staggering gait, head tilt, nystagmus (rhythmic movement of the eyeballs),
and limb weakness or paralysis. These signs are progressive and continue to
worsen. Late signs are stupor and coma.
Canine parvovirus is a highly contagious viral disease that can produce a life-threatening illness. The virus attacks rapidly dividing cells in a dog’s body, most severely affecting the intestinal tract. Parvovirus also attacks the white blood cells, and when young animals are infected, the virus can damage the heart muscle and cause lifelong cardiac problem
A brain abscess is a collection of pus in or around the brain.
The signs are similar to those of a brain tumor. These dogs will often have a
fever. There may be a prior infection in the oral cavity, inner ear, or
Treatment: The diagnosis of tumor or abscess is made by neurological
examination and special tests, including EEG, cerebrospinal fluid analysis, and
CAT scan or MRI. Surgical removal of benign brain tumors may be possible in
some cases. Chemotherapy and radiation therapy have not proven to
be effective against most brain tumors in dogs. There may be temporary
improvement with corticosteroids and anticonvulsants.
Abscesses are treated with high doses of antibiotics. Corticosteroids are usually
contraindicated. The outlook for recovery is guarded.
WebMD Veterinary Reference from "Dog Owner's Home Veterinary Handbook"