What is the prevalence of Encephalocele?

Encephalocele is a rare congenital neural tube defect with an estimated global incidence of approximately 1 in 5,000 to 10,000 live births. While encephalocele is considered a rare condition, true prevalence is difficult to determine due to variations in reporting, high rates of pregnancy termination, and geographic disparities in diagnostic access.

What is the incidence and prevalence of encephalocele?

The incidence of encephalocele varies significantly by region, with higher rates observed in parts of Southeast Asia and lower rates in Europe and North America. Because encephalocele often involves complex surgical intervention and long-term neurodevelopmental support, patients are typically identified at birth or during prenatal ultrasound screening. While 27 individuals have joined the DiseaseMaps.org community to share their experiences with encephalocele, these numbers represent only a fraction of those living with the condition, highlighting the challenges of capturing accurate global prevalence data for rare structural anomalies.

Are there demographic or gender differences in encephalocele?

Research suggests that encephalocele occurs with relatively equal frequency in males and females, though some clinical studies indicate a slight female predominance in cases involving occipital (back of the head) locations. Because encephalocele is a structural defect present from gestation, the age of onset is strictly pediatric, though individuals live with the long-term sequelae into adulthood. Key factors influencing diagnostic numbers include:

• Prenatal screening: Widespread use of fetal ultrasound significantly increases the detection of encephalocele in utero.


• Geographic disparities: Access to specialized neurosurgical centers impacts survival rates and formal diagnostic coding.


• Underdiagnosis: Small or "occult" encephaloceles may remain undiagnosed until later in childhood or adulthood when symptoms like chronic headaches or seizures emerge.

Next steps

• Consult a pediatric neurosurgeon or a specialized craniofacial team for comprehensive evaluation.


• Engage with genetic counseling to discuss recurrence risks and underlying causes.


• Join the DiseaseMaps.org community to connect with other families and share real-world experiences.


• Participate in patient-led registries to help improve the accuracy of data regarding encephalocele.

Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Encephalocele Overview.


• Orphanet: Rare disease database entry for Encephalocele.


• Centers for Disease Control and Prevention (CDC): Data on Neural Tube Defects.


• OMIM (Online Mendelian Inheritance in Man): Clinical features and genetic associations of Encephalocele.