Congenital Nephrotic Syndrome: Causes, Symptoms, and Treatment
Written by Achuta Uppu, MD. Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Congenital Nephrotic Syndrome?
A nephrologist, a doctor who specializes in kidney diseases, leads the care of children with this condition. Nephrologists who focus on children are called pediatric nephrologists. Other team members may include dietitians, nurses, and transplant surgeons. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What it is
Congenital nephrotic syndrome is a rare kidney problem that shows up in babies, usually within the first three months of life. In this condition, tiny filters inside the kidneys, called glomeruli, do not form the way they should. Important proteins leak from the blood into the urine, causing swelling, poor growth, and other serious problems.
Symptoms
The most common sign is swelling, which doctors call edema. It often shows up first around the eyes, then in the belly, legs, and feet. Other signs include foamy urine and a poor appetite. Babies with this condition are often born early with a low birth weight.
Causes and who gets it
Most cases are caused by changes in genes, the instructions inside our cells that guide how the body grows and works. When such a gene is changed, the kidney filters leak protein starting before birth. The condition can run in families and is more common when parents are closely related.
How doctors diagnose it
Doctors often start with a urine test, which checks for protein that should not be there. A blood test can show low protein levels and how well the kidneys are working. Genetic testing can confirm the diagnosis and help guide treatment.
Treatment
Treatment focuses on managing symptoms and preventing complications. Doctors may prescribe medicines to reduce protein loss in the urine, remove extra fluid, lower blood pressure, and prevent blood clots. Babies often need nutrition support and sometimes infusions of albumin, a protein given through a vein. Kidney transplant is usually needed, often in early childhood.
When to see a doctor
Babies with swelling around the eyes, belly, or legs, foamy urine, poor feeding, or slow weight gain should see a doctor right away. If a baby gets a fever or seems very sick, seek medical care immediately. Early testing can find the cause and start treatment sooner.
How a direct primary care or concierge doctor fits in
A direct primary care or concierge doctor can be a helpful partner for families managing a complex condition. These doctors offer longer visits and can coordinate care, helping families stay on track with medicines and follow-up visits.
Common questions
Is congenital nephrotic syndrome the same as regular nephrotic syndrome?
No. Regular nephrotic syndrome can happen at any age and often responds well to steroid medicines. Congenital nephrotic syndrome starts in the first three months of life, is usually caused by gene changes, and does not respond to steroids.
Can it be cured?
The gene changes that cause the condition cannot be corrected. A kidney transplant often allows children to grow and live more normally, because the new kidney does not have the gene problem. Outcomes differ from child to child.
Will my other children get it?
When both parents carry the same changed gene, each pregnancy has a chance of passing on the condition. A genetic counselor can help families understand the risks and options for testing.
Can babies with this condition go to school and live normal lives?
Many children do well after treatment and transplant, though every child is different. With good care, many children attend school and take part in normal activities.
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Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
