Juvenile laryngeal paralysis and polyneuropathy also known as polyneuropathy with ocular abnormalities and neuronal vacuolation (POANV) is a neurological defect seen in Black Russian Terriers and Rottweilers where the disease is known as neuronal vacuolation and neuronal vacuolation and spinocerebellar degeneration (NVSD). Signs of disease include early onset of laryngeal paralysis, microphthalmia (small eyes), cataract and muscle weakness. The disease is progressive and affected animals die or are euthanised
