17 Skull tumour
The first seizure began 20 minutes after the dog’s head was knocked by an opening door. A lump on the side of the dog’s skull was noted by the owners at this time. For the following 5 months the seizures occurred spontaneously every 2 weeks and consisted of a 5 minutes generalized tonic-clonic seizure followed by a post-ictal period lasting several hours during which time the dog did not recognize or respond to the owner. On one occasion, the dog seizured a few hours after the veterinarian pressed the right-sided skull mass. The seizure pattern had changed recently with three seizures occurring during the week prior to referral.
Inter-ictally the dog remained house-trained but had been seen to bump into the furniture and miss its footing when ascending stairs. The claws were heard to drag on the linoleum floor. Episodes of twitching, jerking and clamping the jaws shut, and generally appearing quieter than normal were also observed. These inter-ictal changes had become more noticeable in the 2 weeks prior to referral. The dog had not been treated with any medication.
The dog was quiet but mentally responsive. The gait was normal. The menace response was absent on the left. The placing responses and hopping were all decreased on the left. A raised mass could be seen and palpated (gently) on the right parietal skull.