Porencephaly in dogs and cats: relationships between magnetic resonance imaging (MRI) features and hippocampal atrophy

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  • HORI Ai
    Department of Small Animal Clinical Sciences, School of Veterinary Medicine, Rakuno Gakuen University, 582–1 Bunkyoudai-Midorimachi, Ebetsu, Hokkaido 069–8501, Japan
  • HANAZONO Kiwamu
    Department of Small Animal Clinical Sciences, School of Veterinary Medicine, Rakuno Gakuen University, 582–1 Bunkyoudai-Midorimachi, Ebetsu, Hokkaido 069–8501, Japan
  • MIYOSHI Kenjirou
    Department of Small Animal Clinical Sciences, School of Veterinary Medicine, Rakuno Gakuen University, 582–1 Bunkyoudai-Midorimachi, Ebetsu, Hokkaido 069–8501, Japan
  • NAKADE Tetsuya
    Department of Small Animal Clinical Sciences, School of Veterinary Medicine, Rakuno Gakuen University, 582–1 Bunkyoudai-Midorimachi, Ebetsu, Hokkaido 069–8501, Japan

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Abstract

Porencephaly is the congenital cerebral defect and a rare malformation and described few MRI reports in veterinary medicine. MRI features of porencephaly are recognized the coexistence with the unilateral/bilateral hippocampal atrophy, caused by the seizure symptoms in human medicine. We studied 2 dogs and 1 cat with congenital porencephaly to characterize the clinical signs and MRI, and to discuss the associated MRI with hippocampal atrophy. The main clinical sign was the seizure symptoms, and all had hippocampal atrophy at the lesion side or the larger defect side. There is association between hippocampal atrophy or the cyst volume and the severe of clinical signs, and it is suggested that porencephaly coexists with hippocampal atrophy as well as humans in this study.

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