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.
Estrus, or heat, is the stage in a female dog's reproductive cycle during which she becomes receptive to mating with males. At this time, estrogen levels first increase and then sharply decrease, and mature eggs are released from the ovaries. Ideally, your dog should be spayed before she enters her first heat cycle.
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"