Bilateral Renal Agenesis: Causes and Symptoms

Written by Medicover Team and Medically Reviewed by Dr Siddharth Herur , Nephrologists

Causes
Find a Doctor
Diagnosis
Treatment
FAQs
Book an Appointment

1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Bilateral renal agenesis (BRA) is a rare congenital condition characterized by the absence of both kidneys at birth. This medical anomaly holds significant implications for fetal development and survival. By examining the causes, symptoms, diagnostic methods, and potential treatment options, we aim to provide a comprehensive understanding of BRA and its impacts.

What is Bilateral Renal Agenesis?

Bilateral renal agenesis is a life-threatening condition that occurs in approximately 1 in 4,000 to 1 in 10,000 births. The absence of kidneys leads to a lack of amniotic fluid, resulting in Potter's sequence, a series of physical deformities. These include pulmonary hypoplasia, limb deformities, and characteristic facial features. The prognosis for infants with BRA is typically poor, as the condition is often incompatible with life.

What Are the Causes of Bilateral Renal Agenesis

Genetic Factors

While the exact causes of BRA remain primarily unidentified, genetic factors play a significant role. Mutations in genes such as RET, GDNF, and UPK3A have been implicated in kidney development. These genetic abnormalities can lead to disruptions in the signalling pathways necessary for renal formation.

Environmental Influences

Environmental factors, including maternal diabetes and exposure to teratogens during pregnancy, have been associated with an increased risk of BRA. However, these associations are not yet fully understood and warrant further research to elucidate their impacts.

When to See a Doctor for Bilateral Renal Agenesis?

If prenatal ultrasound reveals absent kidneys in your baby, consult a maternal-fetal medicine specialist and nephrologist immediately. Bilateral renal agenesis is incompatible with life, requiring compassionate counseling and perinatal palliative care planning.

You should see a doctor if you have:

Prenatal ultrasound showing absence of both kidneys or severely reduced amniotic fluid
Concerns about fetal kidney development or lack of visible bladder on ultrasound
Need for comprehensive genetic counseling and discussion of options and prognosis

Get medical help immediately if:

You experience signs of preterm labor or complications during pregnancy with this diagnosis
You need urgent consultation about delivery planning and neonatal comfort care measures

These could be signs of a serious complication like Potter syndrome features, which needs urgent care.

Find Nephrologists for Bilateral Renal Agenesis Treatment Near You

What Are the Symptoms of Bilateral Renal Agenesis?

Identifying Symptoms

Bilateral renal agenesis is typically asymptomatic in early pregnancy. However, as the fetus develops, the absence of amniotic fluid due to lack of urine production becomes apparent. This leads to Potter's sequence, which is identifiable through distinct physical characteristics at birth.

How is Bilateral Renal Agenesis Diagnosed?

Diagnostic Techniques

Ultrasound

Ultrasound remains the primary diagnostic tool for detecting BRA. During a routine prenatal ultrasound, the absence of kidneys and oligohydramnios (low amniotic fluid) may indicate BRA. Detailed imaging can further assess the extent of associated anomalies.

Genetic Testing

In cases where BRA is suspected, genetic testing can help identify potential mutations. This information is crucial for understanding familial recurrence risks and providing genetic counseling to affected families.

What Are the Prognosis and Treatment Options of Bilateral Renal Agenesis?

Prognosis

The prognosis for infants with BRA is generally poor, as the absence of kidneys leads to severe complications, including underdeveloped lungs and renal failure. Most infants with BRA are stillborn or die shortly after birth due to respiratory insufficiency.

Potential Treatments

While there is no definitive cure for BRA, experimental treatments are being explored:

Amnioinfusion: This procedure involves injecting saline into the amniotic cavity to mimic the presence of amniotic fluid. Although it may improve lung development, its efficacy in significantly altering outcomes remains limited.
Renal Transplantation: Postnatal renal transplantation is theoretically possible, but the lack of lung development in affected infants poses significant challenges to survival until transplantation can occur.
Stem Cell Research: Emerging research into stem cell therapy holds promise for regenerating renal tissue, but it remains in the experimental stages and is not yet applicable in clinical practice.

Your health is everything - prioritize your well-being today.

Consult Bilateral Renal Agenesis Doctors Today

What Are the Implications for Parents and Families?

BRA presents profound emotional and ethical challenges for parents and families. Genetic counseling is essential to provide support and guidance, enabling informed decision-making regarding future pregnancies. Organizations and support groups can offer additional resources and a community for affected families to share experiences and coping strategies.