
Living with Congenital bilateral perisylvian syndrome
A rare brain condition where folds around the brain's Sylvian fissure form differently, affecting speech, swallowing, learning and seizures.
Understanding Congenital bilateral perisylvian syndrome
The brain's grooves form incorrectly, leading to many small extra folds. Symptoms appear at birth, in infancy or later in childhood. They can include weakness of the face, tongue, jaw and throat, trouble speaking and swallowing, and drooling. Many people have seizures and mild to severe intellectual disability.
Signs & symptoms
Symptoms vary from person to person. GARD lists these among the most common:
- Weakness of the face, tongue, jaw and throat
- Trouble speaking and swallowing
- Seizures
- Mild to severe intellectual disability
- Delayed speech and language
- Muscle stiffness (spasticity)
Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.
Diagnosis
- 1Talk with your doctor
Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.
- 2See a specialist
Specialists who may be involved include brain and nervous system specialists, genetic specialists and seizure and epilepsy specialists.
- 3Ask which tests can help
Your care team will decide which exams and tests can confirm the diagnosis.
- 4Connect with expert centers
PMG Awareness Organization and Epilepsy Foundation may keep lists of experts for this condition.
Care & treatment
- Care team
- Brain and nervous system specialists (neurologists); Genetic specialists (geneticists); Seizure and epilepsy specialists (epileptologist)
- Expert care
- Expert lists: PMG Awareness Organization, Epilepsy Foundation
- Treatment
- GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
- Research
- Clinical trials and observational studies may be options. See the research section below.
General information, not medical advice. Your care team makes the decisions.
Everyday life
Living with a rare condition is easier with support.
- Connect with PMG Awareness Organization and other patient organizations
- Keep notes on symptoms, changes and questions for appointments
- Ask about patient registries that help research
- Look into financial aid and travel resources for care visits
Quick facts
It can be caused by changes in single genes or chromosome changes such as 22q11.2 deletion syndrome. It has also been reported with complications in twin pregnancies. GARD lists autosomal recessive inheritance.
Also known as: bilateral perisylvian polymicrogyria; perisylvian syndrome
Patient organizations
- PMG Awareness OrganizationCongenital bilateral perisylvian syndrome · United States
- Epilepsy FoundationEpilepsy · United States
You are more than your diagnosis
Perspectives from people navigating life with Congenital bilateral perisylvian syndrome.
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