ICD10 code of Congenital bilateral perisylvian syndrome and ICD9 code

Congenital bilateral perisylvian syndrome (CBPS) does not have a unique, dedicated ICD-10 or ICD-9 code; instead, it is typically classified under broader categories for developmental brain malformations or specific neurological symptoms. Clinicians generally use codes related to "polymicrogyria" or "congenital malformations of the brain" (such as ICD-10 Q04.8 or Q04.9) to document the condition for medical billing and records.

What is the medical classification of Congenital bilateral perisylvian syndrome?

Because Congenital bilateral perisylvian syndrome is a rare neurological disorder characterized by bilateral perisylvian polymicrogyria, it lacks a specific, individual ICD-10 or ICD-9 code. In medical coding, specialists often utilize codes that reflect the underlying structural brain anomaly. For instance, Q04.8 (Other specified congenital malformations of brain) or Q04.9 (Congenital malformation of brain, unspecified) are frequently assigned. It is essential for patients and caregivers to work with their medical billing team to ensure that the primary diagnosis—Congenital bilateral perisylvian syndrome—is noted in the clinical chart alongside these broader classification codes to ensure accurate documentation of the patient's diagnostic journey.

How does the clinical presentation of Congenital bilateral perisylvian syndrome vary?

Congenital bilateral perisylvian syndrome primarily affects the areas of the brain responsible for motor control of the mouth and throat. Patients often experience what is known as "pseudobulbar palsy," which manifests as a significant impairment in speech (dysarthria), chewing, and swallowing (dysphagia). Many individuals diagnosed with Congenital bilateral perisylvian syndrome also experience epilepsy, often starting in childhood, and varying degrees of cognitive impairment. At DiseaseMaps.org, we have seen 45 people with Congenital bilateral perisylvian syndrome join our community, highlighting the importance of shared experiences in managing these complex, multifaceted symptoms.

What diagnostic criteria define this condition?

Diagnosis of Congenital bilateral perisylvian syndrome is typically confirmed through high-resolution neuroimaging, most commonly MRI. The hallmark finding is bilateral polymicrogyria—a condition where the brain's surface has too many small folds—specifically located within the perisylvian regions. Clinicians look for the following clinical features when evaluating a suspected case:

• Oromotor dysfunction: Difficulty with voluntary movements of the tongue, lips, and palate.


• Dysarthria: Severe speech impairment often appearing early in childhood.


• Dysphagia: Persistent difficulties with swallowing, which may require specialized nutritional support.


• Epilepsy: Seizure activity that may be focal or generalized, requiring tailored anti-seizure medication.


• Cognitive profile: A spectrum of intellectual development ranging from near-normal intelligence to moderate or severe intellectual disability.

Is there a genetic basis for Congenital bilateral perisylvian syndrome?

Research suggests that Congenital bilateral perisylvian syndrome can be associated with various genetic causes, including mutations in genes involved in neuronal migration, such as SRPX2 or TUBB2A. However, many cases are sporadic. Genetic counseling is highly recommended for families to understand the inheritance pattern, if any, and to discuss the recurrence risk for future pregnancies. A clinical geneticist can help determine if specific molecular testing is appropriate based on the individual's family and medical history.

Next steps

• Consult a pediatric neurologist or a specialist in neurodevelopmental disorders to confirm the diagnosis and manage ongoing symptoms.


• Request a referral to a speech-language pathologist (SLP) for assistance with oromotor dysfunction and communication strategies.


• Join the DiseaseMaps.org community to connect with other families navigating the challenges of Congenital bilateral perisylvian syndrome.


• Work with a geneticist to explore whether targeted genetic testing is beneficial for your specific clinical picture.

Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician or other qualified health provider with any questions regarding a medical condition.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Bilateral perisylvian polymicrogyria.


• Orphanet: Congenital bilateral perisylvian syndrome (ORPHA: 2844).


• OMIM (Online Mendelian Inheritance in Man): Perisylvian polymicrogyria (#300531).


• PubMed: Clinical and genetic review of polymicrogyria-related syndromes.