Cerebellar Hypoplasia

Signs of cerebellar disease include: dogs have an uncoordinated gait (ataxia) with stilted "toy soldier" leg movements. They can display "intention tremors," where a stretched out limb or head shakes more and more violently as it approaches its target. At rest, dogs sometimes display a "truncal sway;" their spinal muscles have lost their fine-tuning, pulling the spine (and everything attached to it) back and forth in a struggle to maintain balance. The muscles of the eyes have also lost this fine-tuning, leading to a rhythmic eye flicking (nystagmus).

Affected pups are abnormal from birth and, even before they open their eyes, show signs of cerebellar disease including intention tremors and truncal sway. As they begin to walk they show uncoordinated gait and poor balance of cerebellar disease.

Unless a genetic basis is suspected due to the age, breed, or history of the dog, diagnostics must be performed to rule out infectious, inflammatory, or neoplastic causes.

There is no treatment for this disorder. Certain medications may be prescribed to control symptoms.

Talk to your vet about your dog’s cerebellar hypoplasia result so you can plan appropriate care and monitoring.

Signs such as unsteady movement or wobbliness on their feet usually appear when puppies begin to walk and persist throughout life.

Keep your dog’s environment calm and consistent. Use rugs or mats to prevent slipping and help them move safely around the home.

With supportive care, many dogs adapt well and enjoy daily life; however, those with more severe symptoms may need extra help to stay comfortable and safe.

Cerebellar hypoplasia (CH) is a developmental disease that can arise from a genetic mutation or from environmental insults during development (in utero infection with canine parvovirus being one of the most common, nongenetic causes of cerebellar disease). It has a known genetic basis in the Eurasier, where the condition has been mapped to a mutation in the VLDLR gene.

Penetrance: This disease is inherited in an autosomal recessive manner, meaning that affected dogs must have two copies of the mutation to show clinical signs.

Gene

VLDLR

Inheritance type

recessive

Clinical category

Neurologic

Citations

1. Gerber et al 2015

• Eurasier