Clinical and MRI Findings of Lissencephaly in a Mixed Breed Dog

概要

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A 7-year-old castrated male mixed dog was presented with a complaint of acute pain. The dog had suffered from isolated seizures for two years. Magnetic resonance imaging (MRI) of the brain revealed a smooth brain surface due to lack of gyri and sulci formation of the cerebrum and thick cortical grey matter. Additionally, ventriculomegaly and arachnoid cyst were noted. Multiple spinal cord compressions induced by intervertebral disc protrusion were observed on cervical MRI. Based on these findings, the dog was diagnosed as lissencephaly concurrent with intervertebral cervical disease. After therapy for seizure and cervical pain, clinical signs were completely resolved. To authors knowledge, this is first case report to diagnose lissencephaly in a mixed breed dog.