Astrocytoma in a dog causing convulsions

An adult, male, 7 Kg. dog was presented because of a convulsion. This progressed and interictal signs became apparent. A slight left spastic hemiparesis was present with a normal gait and posture. A partial left visual deficit with intact pupillary reflexes became evident. All signs were referable to a right cerebral lesion. Necropsy revealed an astrocytoma in the right cerebrum compressing the internal capsule and optic tract.