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Rare kidney & urinary condition

Nephronophthisis in adults

Nephronophthisis is a recessive ciliopathy scarring the kidney's tubules and is a leading genetic cause of kidney failure in children and young people - adult-onset forms exist and are underdiagnosed.

Key points

The essentials at a glance.

What to look out for, how the diagnosis is confirmed, who looks after it, and the options that exist.

  • 01

    Early clues are subtle: excessive drinking and urination, bed-wetting relapse in a child, anaemia and fatigue - with bland urine.

  • 02

    Kidney failure typically arrives in adolescence (juvenile form), but later-onset disease reaches adult clinics.

  • 03

    It is caused by variants in NPHP and related cilia genes; a fifth or so of cases have features beyond the kidney (eyes, liver, brain).

  • 04

    Ultrasound shows normal or small kidneys, sometimes with cysts at the cortico-medullary junction - easily read as nonspecific.

  • 05

    Genetic testing confirms the diagnosis, ends the biopsy trail and informs siblings; transplantation is curative for the kidney disease.

Understanding it

What it is, and what happens next.

In plain English - what is going on, how specialists confirm it, and the routes to treatment in the UK.

Nephronophthisis damages the primary cilium - the cell's antenna - and the tubules respond with atrophy, disrupted membranes and interstitial scarring. Because it produces no blood, little protein and no hypertension until late, it is the archetypal silent decline: young people arrive with advanced failure and small kidneys, their earlier years of thirst and weak urine concentration recognised only in hindsight.

For young adults with unexplained scarred kidneys, gene-panel testing has replaced biopsy as the decisive investigation: a confirmed ciliopathy ends the diagnostic odyssey, prompts screening of eyes and liver for syndromic features, allows carrier counselling for the family, and clears the path to transplantation - in which the disease does not recur. In many parts of the UK, routine NHS outpatient referrals for problems like this can take several months, whereas an initial appointment with a private consultant is typically available within around two weeks.

A quiet reminder

This guide is for information, not medical advice.

Your GP or specialist knows your history and can tell you which parts apply to you. If in doubt, speak to them.

Published 2026-09-27 · Next review 2027-09-27

Frequently asked

Common questions about Nephronophthisis in adults.

Quick, plain-English answers to what people ask us most.

  • What is nephronophthisis in adults?

    Nephronophthisis is a rare inherited kidney condition causing progressive scarring and cysts within the kidney, leading to chronic kidney disease that typically progresses to kidney failure, sometimes not becoming apparent until adolescence or adulthood in milder forms.

  • What causes nephronophthisis?

    It's caused by mutations in genes involved in the function of cilia, tiny structures on kidney cells, inherited most commonly in an autosomal recessive pattern.

  • What are the symptoms of nephronophthisis in adults?

    Symptoms can be subtle initially, including excessive thirst and urination due to reduced urine concentrating ability, fatigue, and gradually declining kidney function, sometimes without the more prominent features seen in childhood-onset cases.

  • Is nephronophthisis hereditary?

    Yes, it's a genetic condition, most commonly inherited in an autosomal recessive pattern, meaning both parents carry one copy of a faulty gene without necessarily having the condition themselves.

  • Is nephronophthisis dangerous?

    Yes, it typically leads to progressive kidney failure over years, eventually requiring dialysis or kidney transplant, though the rate of progression varies between specific genetic subtypes.

  • Can nephronophthisis be treated?

    There's no treatment that reverses the underlying kidney scarring, but supportive care can slow progression and manage complications, with dialysis or transplant needed once kidney failure develops.

  • When should I see a nephrologist about suspected nephronophthisis, and how quickly can I be seen privately?

    See a nephrologist if you have unexplained excessive thirst and urination with declining kidney function, particularly with a family history of kidney disease. A private nephrologist can typically arrange assessment within about two weeks.