[Periventricular nodular heterotopia : a pediatric case]

Area of Science:

• Neuroscience
• Genetics
• Developmental Biology

Background:

• Periventricular nodular heterotopia (PVNH) is a congenital cerebral cortex malformation.
• It arises from deletions or duplications in the FLNA gene on the X chromosome, encoding a cytoskeleton protein.
• PVNH belongs to the heterogeneous group of philaminopathies with dominant inheritance.

Observation:

• The condition exhibits a female predominance, with males often experiencing early lethality.
• Clinical manifestations include seizure disorders (mild to intractable), mental retardation, hypotonia, and cardiovascular abnormalities.
• Associated complications involve vasculopathy and coagulopathy, potentially leading to stroke.

Findings:

• The FLNA gene mutation is the underlying cause of PVNH.
• The X-linked dominant inheritance pattern explains the observed sex bias.
• A spectrum of neurological and systemic abnormalities characterizes the clinical presentation.

Implications:

• Multidisciplinary team surveillance is crucial for managing patients with PVNH.
• Genetic counseling is essential for affected families.
• Understanding FLNA gene function is key to developing targeted therapies for PVNH and related disorders.