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PubMed This is a summary of 59 peer-reviewed journal articles Updated
Nephrology

Understanding Nephronophthisis

At a Glance

Nephronophthisis (NPHP) is a rare, inherited childhood kidney disease that causes chronic scarring. It is definitively diagnosed through genetic testing. While it eventually requires a kidney transplant, transplants are highly successful and the disease does not return in the new donor kidney.

Receiving a diagnosis of Nephronophthisis (NPHP) can feel overwhelming, especially because it is a rare condition that many local doctors may not see often. While the path ahead involves significant medical management, there are several foundational truths that can provide stability for your family as you navigate this journey.

Three Stabilizing Facts

When facing a rare diagnosis, it is helpful to focus on what is known and what can be managed. Research and clinical experience highlight three key points:

  1. Genetic Testing Provides Certainty: Because NPHP symptoms can be vague, the diagnostic process can be frustrating. However, genetic testing (using specialized blood tests to look at DNA) is now considered the gold standard for establishing a definitive diagnosis [1][2]. Identifying the specific gene involved helps your team understand the likely course of the disease and monitor for any related health issues in other organs.
  2. Kidney Transplantation is Highly Successful: While NPHP eventually leads to the need for a new kidney, kidney transplantation is a safe and very effective treatment for children with this condition [3]. Outcomes for children with NPHP after a transplant are generally excellent, with high survival rates for both the patient and the new kidney [3][4].
  3. The Disease Does Not Return in the New Kidney: One of the most reassuring aspects of NPHP is that there is almost zero risk of the disease recurring (coming back) in the transplanted kidney [5]. While your child’s underlying systemic genetics remain unchanged, the donor kidney comes with its own healthy genetic blueprint, which protects it from developing NPHP [5].

What is Nephronophthisis?

Nephronophthisis (pronounced nef-rono-f-th-eye-sis) is a rare, inherited kidney disorder [6]. It is an autosomal recessive condition, meaning a child must inherit one copy of the mutated gene from each parent to develop the disease [6].

In NPHP, the kidneys develop tubulointerstitial nephritis—a type of chronic inflammation and scarring in the tissues that filter waste and balance fluids [6][7]. Over time, this scarring prevents the kidneys from working properly. Some children may also develop small fluid-filled sacs called cysts deep within the kidneys, though these are not always present in the early stages [6].

Navigating This Guide

To help you understand and manage your child’s condition, we have divided this resource into several specific topics:

01

Symptoms & Warning Signs: Recognizing NPHP

Learn the early warning signs of Nephronophthisis (NPHP) in children, including extreme thirst, frequent urination, bedwetting, anemia, and delayed growth.

02

Biology & Genetics: The Causes of NPHP

Learn about the genetic causes of Nephronophthisis (NPHP). Understand how primary cilia work, the different NPHP genes, and how the condition is inherited.

03

Diagnosis & Testing: Confirming NPHP

Learn how Nephronophthisis (NPHP) is diagnosed. Understand why genetic testing is the gold standard over kidney biopsies and what early ultrasound scans reveal.

04

Extra-Renal Manifestations: Beyond the Kidneys

Learn how Nephronophthisis (NPHP) can affect organs beyond the kidneys. Understand the signs of Senior-Løken syndrome, Joubert syndrome, and liver involvement.

05

Standard of Care Treatment: Managing NPHP

Learn about standard of care treatments for Nephronophthisis (NPHP) in children, including managing salt-wasting, anemia, and planning for a kidney transplant.

06

Building Your Care Team: Specialists You Need

Learn which specialists your child needs for Nephronophthisis (NPHP) care. Understand the roles of a pediatric nephrologist, ophthalmologist, and geneticist.

Common questions in this guide

What is Nephronophthisis?
Nephronophthisis (NPHP) is a rare, inherited kidney disorder that causes inflammation and scarring in the kidney tissues. Over time, this scarring prevents the kidneys from filtering waste and balancing fluids properly.
How is Nephronophthisis diagnosed?
Genetic testing using specialized blood tests to look at DNA is the gold standard for diagnosing NPHP. Identifying the specific gene helps doctors understand the expected disease course and monitor for related issues in other organs.
Can Nephronophthisis return after a kidney transplant?
No, there is almost zero risk of NPHP recurring in a transplanted kidney. Because the disease is genetic, the donor kidney comes with its own healthy genetic blueprint, which protects it from developing the condition.
Is there a risk that my other children will develop Nephronophthisis?
NPHP is an autosomal recessive genetic condition, meaning a child must inherit a mutated gene from both parents. Because of this, siblings do have a risk of inheriting the condition and should be screened by a medical geneticist.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Which specific gene mutation was identified in my child's genetic testing (e.g., NPHP1), and how does that inform their prognosis?
  2. 2.What is my child's current stage of chronic kidney disease, and what is our anticipated timeline for a transplant?
  3. 3.Can we begin the evaluation process for a kidney transplant now to avoid or minimize time spent on dialysis?
  4. 4.Since this is a genetic condition, what is the risk for my other children, and when should they be screened?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (7)
  1. 1

    Nephronophthisis 13 caused by WDR19 variants with pancytopenia: case report.

    Tanaka Y, Horinouchi T, Inoki Y, et al.

    CEN case reports 2024; (13(6)):474-478 doi:10.1007/s13730-024-00871-5.

    PMID: 38589766
  2. 2

    Case Report: A renal wasting disease caused by a pure deletion of nephrocystin-1.

    Dong T, Luo J, Sun T, et al.

    Frontiers in pediatrics 2025; (13()):1541411 doi:10.3389/fped.2025.1541411.

    PMID: 40620856
  3. 3

    Long-Term Outcomes of Kidney Transplant Recipients With Juvenile Nephronophthisis.

    Avcı B, Baskın E, Gülleroğlu K, et al.

    Experimental and clinical transplantation : official journal of the Middle East Society for Organ Transplantation 2022; (20(Suppl 3)):122-125 doi:10.6002/ect.PediatricSymp2022.O39.

    PMID: 35570616
  4. 4

    Genotype and phenotype analysis and transplantation strategy in children with kidney failure caused by NPHP.

    Li J, Su X, Zhang H, et al.

    Pediatric nephrology (Berlin, Germany) 2023; (38(5)):1609-1620 doi:10.1007/s00467-022-05763-3.

    PMID: 36227438
  5. 5

    A case report of two Chinese monozygotic twins with NPHP1 gene-associated nephronophthisis undergoing kidney transplantation from a related living-donor.

    Liu Y, Qiu T, Chen Z, et al.

    Transplant immunology 2023; (78()):101828 doi:10.1016/j.trim.2023.101828.

    PMID: 36948406
  6. 6

    Novel pathogenic MAPKBP1 variant in a family with nephronophthisis.

    Al-Hamed MH, Alzaidan H, Hussein M, et al.

    Clinical kidney journal 2021; (14(2)):728-730 doi:10.1093/ckj/sfaa090.

    PMID: 33623699
  7. 7

    Cystic Kidney Diseases That Require a Differential Diagnosis from Autosomal Dominant Polycystic Kidney Disease (ADPKD).

    Sekine A, Hidaka S, Moriyama T, et al.

    Journal of clinical medicine 2022; (11(21)) doi:10.3390/jcm11216528.

    PMID: 36362756

This page provides an educational overview of Nephronophthisis (NPHP). It is not a substitute for professional medical advice. Always consult your child's pediatric nephrologist or genetic specialist for specific medical guidance.

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