Stereotactic radiosurgery (SRS) is a procedure that delivers a single large radiation dose to a well-defined target. Here, we describe a frameless SRS technique suitable for intracranial targets in canines. Medical records of dogs diagnosed with a primary intracranial tumour by imaging or histopathology that underwent SRS were retrospectively reviewed. Frameless SRS was used successfully to treat tumours in 51 dogs with a variety of head sizes and shapes. Tumours diagnosed included 38 meningiomas, 4 pituitary tumours, 4 trigeminal nerve tumours, 3 gliomas, 1 histiocytic sarcoma and 1 choroid plexus tumour. Median survival time was 399 days for all tumours and for dogs with meningiomas; cause-specific survival was 493 days for both cohorts. Acute grade III central nervous system toxicity (altered mentation) occurred in two dogs. Frameless SRS resulted in survival times comparable to conventional radiation therapy, but with fewer acute adverse effects and only a single anaesthetic episode required for therapy.

Seizure control was achieved in most cats with a serum PB concentration between 15 and 45 μg/mL, regardless of the cause of the seizures. A modified 2011 ILAE classification was applied to cats with seizures and enabled classification of cats without specific genetic testing and without identified structural or inflammatory disease. This classification system should be incorporated into veterinary neurology nomenclature to standardize communication between veterinarians and improve comparisons among species.

Seizures occur commonly in cats and can be classified as idiopathic epilepsy, structural epilepsy, or reactive seizures. Pursuit of a diagnosis may include a complete blood count, serum biochemistry, brain MRI, and cerebrospinal fluid analysis as indicated. Antiepileptic drugs should be considered if a cat is having frequent seizures, or any 1 seizure longer than 5 minutes. Phenobarbital is often the drug of choice; however, levetiracetam may be more useful for certain types of epilepsy in cats. Long-term prognosis depends on the underlying diagnosis and response to therapy.

Although the prevalence of spinal shock was low, it should be considered in any dog presenting with an acute history of thoracolumbar spinal injury with reduced or absent reflexes in the pelvic limbs. The presence of spinal shock should not dissuade a veterinarian from pursuing appropriate diagnostic testing and therapy for the underlying etiology.

The evaluated FS PDw-TSE sequences are superior in comparison to the T2wDESS-3D-we and 3D-PDw-SPACE-we sequences in the in vitro setting for the detection of cartilage lesions, and are comparable to results reported in the literature.