What is the prevalence of Truncus Arteriosus?

Truncus arteriosus is a rare congenital heart defect occurring in approximately 0.03 to 0.05 per 1,000 live births, accounting for roughly 1% of all congenital heart disease cases. Because it requires immediate surgical intervention shortly after birth, it is almost exclusively identified in the neonatal period, with no significant prevalence in the general adult population without prior corrective surgery.

What is the incidence and prevalence of Truncus Arteriosus?

According to data from NIH GARD and Orphanet, truncus arteriosus is considered a rare condition. The estimated incidence is approximately 7 to 10 cases per 100,000 live births globally. While it is rare, the DiseaseMaps.org community currently supports 105 individuals and families living with truncus arteriosus, providing a vital network for shared experiences. It is important to note that global prevalence statistics can be difficult to track precisely, as some cases may result in pregnancy loss, which may not always be captured in standard birth registries.

Are there demographic or gender differences in Truncus Arteriosus?

Clinical literature suggests that truncus arteriosus affects males and females with relatively equal frequency, though some studies have noted a slight male predominance in certain cohorts. There are no definitive geographic or ethnic "hotspots" for the condition, though it is more commonly associated with specific genetic syndromes, such as 22q11.2 deletion syndrome (DiGeorge syndrome). Factors that influence the reporting of truncus arteriosus include:

• Access to advanced prenatal screening (fetal echocardiography).


• Availability of specialized pediatric cardiac surgical centers.


• Regional differences in reporting standards for congenital anomalies.

Why is accurate data for Truncus Arteriosus difficult to obtain?

Tracking the true prevalence of truncus arteriosus is challenging due to variations in how congenital heart defects are recorded in international databases. Furthermore, the complexity of the condition means that some cases are diagnosed alongside other severe chromosomal abnormalities, which may lead to variations in how the primary diagnosis is coded. Because truncus arteriosus is a life-threatening structural defect, nearly all cases are identified at birth, meaning "underdiagnosis" in the traditional sense is less common than in milder, asymptomatic rare diseases.

Next steps

• Consult a pediatric cardiologist or a congenital heart surgeon for specialized care and long-term management.


• Connect with the 105 members of the truncus arteriosus community at DiseaseMaps.org for peer support.


• Discuss genetic counseling with your medical team to understand if the condition is linked to underlying genetic factors.

Medical disclaimer: This information is for educational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician or other qualified health provider.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Truncus Arteriosus.


• Orphanet: Rare disease database, ORPHA:874.


• OMIM (Online Mendelian Inheritance in Man): Truncus Arteriosus, Persistent.


• American Heart Association (AHA): Congenital Heart Defect Statistics.