A 4 year old castrated male Irish Setter dog had an approximately 1.5 year history of seizures that were controlled with phenobarbital, potassium bromide and levetiracetam. The seizures recently progressed with a frequency of approximately every other week. Additionally, a left sided head tilt and balance problems have developed in the past 2-3 days. On physical examination there was a marked head tilt to the left with no nystagmus and normal cranial nerve assessment.
Questions for discussion after reviewing images:
What are the prioritized differential diagnoses based on the MRI?
What are the recommendations regarding either further imaging/diagnostics or therapy, based on the MRI?