Periventricular nodular heterotopia in a Chihuahua
Leonie F Herkommer1, Manfred Henrich1, Christiane Herden1
1Institute for Veterinary-Pathology, Justus-Liebig-University Giessen, Giessen, Germany.
Insights
Periventricular nodular heterotopia, a brain malformation causing epilepsy, was diagnosed in a Chihuahua. This condition involves misplaced neurons in the brain, leading to neurological symptoms.
Area of Science:
- Veterinary Neurology
- Developmental Neuroscience
- Comparative Pathology
Background:
- Periventricular nodular heterotopia is a recognized human neuronal migration disorder.
- Epilepsy and other neurological deficits are common sequelae in affected individuals.
- Understanding its occurrence in non-human species can offer comparative insights.
Observation:
- A 2-month-old Chihuahua presented with epileptic seizures, abnormal gait, and behavioral changes.
- Clinical examination indicated a multifocal neurological disease affecting the forebrain and spinovestibular system.
- Magnetic resonance imaging revealed bilateral periventricular nodules and ventriculomegaly.
Findings:
- Histopathological examination confirmed the periventricular nodules were composed of neurons, astrocytes, and oligodendroglia.
- Immunohistology supported the diagnosis of periventricular nodular heterotopia.
- The findings represent a case of this neuronal malformation in a canine patient.
Implications:
- This case highlights periventricular nodular heterotopia as a potential cause of epilepsy in dogs.
- It underscores the importance of advanced neuroimaging and histopathology for diagnosing complex neurological conditions in animals.
- Further comparative studies may elucidate sharedPathogenic mechanisms between human and canine neuronal migration disorders.
Abstract:
Periventricular nodular heterotopia is a common neuronal malformation in humans, often leading to epilepsy and other neurologic diseases. A 2-month-old female Chihuahua weighing 750 g was examined because of a history of epileptic seizures and abnormalities in gait and behavior. Results of the clinical examination were consistent with a multifocal neurologic disease with localization in the forebrain and spinovestibular system. The magnetic resonance imaging showed multiple bilateral periventricular nodules isointense to gray matter and ventriculomegaly. Histopathological and immunohistological examination of the brain revealed that periventricular nodules consisted of neurons, fewer astrocytes, and some oligodendroglia consistent with periventricular nodular heterotopias.
Related Concept Videos
01:29Cardiomyopathy III: Hypertrophic Cardiomyopathy
01:30Cardiomyopathy II: Dilated Cardiomyopathy