What is the prevalence of Bilateral Renal Agenesis?

Bilateral Renal Agenesis (BRA), also known as Potter sequence, is a rare and severe congenital condition with an estimated incidence of approximately 1 in 4,000 to 1 in 10,000 births. Because the condition is typically incompatible with life due to severe pulmonary hypoplasia, it is almost exclusively identified in the prenatal or neonatal period, making prevalence in the adult population effectively zero.

How frequent is Bilateral Renal Agenesis?

Bilateral Renal Agenesis is considered a rare condition. While incidence rates vary by study, the NIH Genetic and Rare Diseases Information Center (GARD) suggests a frequency of roughly 1 in 4,000 live births. It is important to note that these figures may underrepresent the true incidence because many cases result in pregnancy loss or stillbirth, which are not always captured in standard live-birth registries.

Are there variations in how Bilateral Renal Agenesis presents?

Data regarding the epidemiology of Bilateral Renal Agenesis indicates several distinct patterns:

• Gender Distribution: There is a documented male predominance, with males affected approximately 2 to 3 times more often than females.


• Age of Onset: Bilateral Renal Agenesis is diagnosed prenatally via ultrasound or shortly after birth; there are no cases of adult-onset diagnosis.


• Geographic/Ethnic Factors: While no specific ethnic group is known to have a significantly higher risk, the condition appears sporadically in most families, though recurrence risk for future pregnancies is estimated at approximately 3-5%.

Why is accurate data for Bilateral Renal Agenesis challenging to collect?

The primary challenge in tracking Bilateral Renal Agenesis statistics is the high rate of pregnancy termination or spontaneous loss, which often leads to under-reporting in clinical databases. Furthermore, 19 members have joined the DiseaseMaps.org community to share their experiences, providing a crucial real-world perspective on the diagnostic journey and the physical and emotional impact of this rare diagnosis on families.

Next steps

• Consult with a maternal-fetal medicine specialist or a clinical geneticist for detailed counseling.


• Connect with the community at DiseaseMaps.org to find support from others who have navigated the complexities of this diagnosis.


• Request a referral to a genetic counselor to discuss the recurrence risk and potential screening options for future pregnancies.

Medical disclaimer: This content is for informational purposes only and does not constitute medical advice; always consult with a qualified healthcare professional regarding clinical concerns.

References

• Orphanet: Potter sequence / Bilateral renal agenesis (ORPHA:2848).


• NIH Genetic and Rare Diseases Information Center (GARD): Renal agenesis, bilateral.


• OMIM (Online Mendelian Inheritance in Man): Renal Agenesis, Bilateral (Entry #266900).