Cerebellar Vermis Agenesis (Dandy Walker Syndrome)
Congenital malformations of the cerebellum are occasionally seen (see references under Anomalous Diseases). Caudal vermian hypoplasia is described, with some dogs having associated ventricular dilation (Dandy-Walker malformation). This is a rare congenital malformation that shares similarities with the human form of the disease. It consists of a triad of congenital anomalies including cerebellar vermian hypoplasia, communicating hydrocephalus, and the presence of a fluid-filled cyst (syrinx) within the posterior fossa.
Age of Onset: 2 weeks - 3 months of age
Sex Predisposition: Any sex of animal can be affected
Clinical Course:
Clinical signs typically did not worsen over time
Clinical signs typically did not worsen over time
Clinical Signs:
Movement
Ataxia
Hypermetria
Intention tremors
"Bunny hopping" gait
Cranial Nerves
Vestibular signs (head tilt, circling, nystagmus)
Absent menace response
Movement
Ataxia
Hypermetria
Intention tremors
"Bunny hopping" gait
Cranial Nerves
Vestibular signs (head tilt, circling, nystagmus)
Absent menace response
Intracranial- Cerebellum
Unknown
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