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Adolescent Urology
Posterior Urethral Valves (PUV)
Posterior urethral valves are a congenital obstruction of the male urethra, usually treated in infancy — but their long-term consequences for the bladder and kidneys make specialist adolescent and adult follow-up essential.
Clinically reviewed by
Mr Anthony Noah
Consultant Urological Surgeon · Reviewed August 2026 · Review due August 2027
What are Posterior Urethral Valves?
Posterior urethral valves (PUV) are abnormal folds of tissue in the posterior aspect of the male urethra, sitting below the bladder neck (usually at the lower part of the prostate), that obstruct the normal flow of urine out of the bladder. PUV is a congenital condition (it is present from before birth) and only affects boys. It is most commonly diagnosed in infancy, often detected on antenatal ultrasound scans because of a dilated foetal bladder or kidneys.
The valves themselves are typically treated by endoscopic ablation in the first few days of life. This relieves the obstruction at source. However, by the time the valves are ablated, the bladder and kidneys have often already sustained significant damage from working against the obstruction in utero. These secondary effects on the bladder and kidneys persist throughout life and frequently become more apparent during adolescence and adulthood.
Adolescent and adult care for PUV therefore focuses not on the valves themselves, but on the long-term consequences — monitoring kidney function, managing bladder dysfunction, treating incontinence, and supporting the young person as they transition from paediatric services to adult care. Our consultant Mr Anthony Noah leads this service at London Urology Specialists.
PUV is a lifelong condition
Even when valve ablation in infancy has gone smoothly, the underlying bladder and kidney injury is permanent and can change over time. Lifelong specialist follow-up gives the best chance of preserving kidney function, maintaining continence, and treating problems early.
Long-Term Consequences of PUV
Even after successful endoscopic valve ablation in childhood, many young men with PUV develop ongoing problems with the bladder and kidneys. These can emerge gradually and may be missed without regular specialist review. The most important long-term consequences are:
Bladder Dysfunction ("Valve Bladder Syndrome")
A spectrum of bladder problems that includes poor compliance (the bladder cannot stretch normally), high storage pressures, and abnormal contractility. The result is reduced functional capacity, voiding difficulty, and ongoing risk to the kidneys.
Chronic Kidney Disease
A significant proportion of men with PUV develop chronic kidney disease in adolescence or adulthood, and some progress to dialysis or kidney transplantation. Regular monitoring of blood tests and imaging is essential to preserve function for as long as possible.
Urinary Incontinence
Daytime and night-time leakage can occur in adolescence and can be socially limiting. The pattern is varied: overactive bladder, overflow from a poorly emptying bladder, and sphincter weakness can all contribute and need to be teased apart with urodynamics.
Voiding Difficulty & Incomplete Emptying
A slow or interrupted stream is common. A persistent feeling of incomplete emptying can also occur. Significant post-void residual urine raises the risk of infection and bladder stone formation. It could also cause back-pressure on the kidneys, so it needs to be identified and managed.
Recurrent Urinary Tract Infections
Incomplete bladder emptying and abnormal bladder pressures predispose to recurrent UTIs. Each infection carries additional risk to the kidneys and needs prompt, targeted treatment as part of an overall management strategy.
Vesicoureteral Reflux
Reflux of urine from the bladder back up towards the kidneys is often present at birth in boys with PUV. It may improve after the valves are ablated but can persist and contributes to ongoing kidney injury and infection risk.
The valves are gone — but the bladder remembers
The most important shift in understanding PUV in the past 20 years has been the realisation that the bladder, not the valves, drives long-term outcomes. Pro-active monitoring and bladder management protect the kidneys and underpin everything we do in adolescent PUV care.
Why Adolescent Care Matters
Many young men with treated PUV face a "transition gap" when they leave paediatric urology services and have to navigate adult care for the first time. A surprising number are lost to follow-up during this period, often because they feel well and life is busy. Dedicated adolescent and adult PUV care is essential to:
Preserve Remaining Kidney Function
Many adolescents with PUV have reduced baseline kidney function. Careful monitoring of blood tests, bladder pressures, and infections allows us to detect changes early and intervene before any further damage is done.
Manage Bladder Dysfunction Proactively
Urodynamic testing characterises how the bladder is behaving so that medical and behavioural treatment can be tailored. Active bladder management is one of the most important things we can do to protect the upper urinary tract.
Address Incontinence and Voiding Difficulties
Continence and reliable bladder emptying are vital to quality of life. We offer behavioural therapy, medication, intermittent self-catheterisation, and surgery where needed to give young men confidence in their daily lives.
Plan for the Future — Including Fertility and Family
Adolescence is the right time to start frank conversations about fertility, relationships, and family planning. We discuss what PUV may mean for these areas of life and arrange semen analysis and fertility input whenever appropriate.
Assessment & Investigations
Assessment in the adolescent PUV clinic is comprehensive and tailored to your individual story. A typical workup includes:
Renal Function Blood Tests
Serum creatinine and estimated glomerular filtration rate (eGFR), alongside electrolytes, bicarbonate, and where indicated, formal kidney function measurement. These are the core measurements we use to track kidney function over time.
Bladder Ultrasound & Post-Void Residual
A simple, non-invasive measure of bladder wall thickness, capacity, and how well the bladder empties. A significant post-void residual is an early warning sign and helps direct further investigation and treatment.
Urodynamic Studies
A pressure-flow study that characterises the behaviour of the bladder during filling and voiding. Urodynamics is essential in adolescent PUV care — it tells us about compliance, storage pressures, contractility, and the sphincter, and directly informs treatment.
Cystoscopy (Where Indicated)
A small flexible camera examination of the urethra and bladder, performed under local anaesthetic. We use it where there are structural concerns — for example to confirm complete valve ablation, assess the bladder neck, or look for stones or strictures.
MAG3 / DMSA Renal Scan
Nuclear medicine scans that measure the individual function of each kidney (DMSA) and how freely urine drains from the kidneys to the bladder (MAG3). They are particularly useful where one kidney is doing more or less of the overall work, or where drainage is in question.
CT or MRI Upper Tract Assessment
A CT or MR urogram gives detailed anatomical information about the kidneys, ureters, and bladder. An MRI offers similar detail without the radiation of a CT scan. It is particularly useful in younger patients with PUV who will be having lifelong imaging.
Treatments We Offer at LUS
Treatment is highly individualised — there is no single PUV pathway. The right plan depends on bladder behaviour, kidney function, symptoms, and your own priorities. The following treatments are delivered directly by our specialist team at London Urology Specialists:
Long-Term Surveillance & Monitoring
Cornerstone of CareRegular review with blood tests, imaging, and symptom assessment forms the backbone of PUV care. The interval is tailored: typically annual for stable patients, more frequent when there are concerns. Surveillance is what allows us to detect change early and intervene before damage is done.
Bladder Management
Primary TreatmentOptimising how the bladder stores and empties urine is the most important thing we do to protect the kidneys. Based on your urodynamic findings we may use any combination of:
- ›Anticholinergic medication — to relax an overactive bladder and lower storage pressures
- ›Beta-3 agonists — a newer class of bladder relaxant with fewer side effects, often used long-term
- ›Intermittent self-catheterisation — for incomplete emptying, ensuring the bladder empties fully and protecting the kidneys
- ›Timed voiding and fluid advice — simple but powerful behavioural changes that complement medical treatment
Treatment of Urinary Incontinence
Symptom-FocusedTargeted treatment of leakage depends on its mechanism. Overactive bladder is the usual cause of incontinence in PUV and can be treated medically as above or surgically. We discuss the trade-offs of each option in detail.
Surgical Management of Secondary Problems
Specialist SurgeryA range of focused surgical procedures can address secondary problems — Botox for overactive bladder, bladder neck procedures for outflow obstruction, urethral stricture treatment, removal of residual valve tissue, or stone surgery. Some cases require bladder reconstruction with cystoplasty and/or Mitrofanoff formation. Each procedure is tailored to your specific anatomy and goals.
Coordination with Nephrology
Multidisciplinary CareFor patients with reduced kidney function we work closely with adult nephrology services to ensure joined-up care — including blood pressure management, electrolyte review, and pre-emptive planning for renal replacement where this becomes relevant.
A personalised plan, reviewed over time
PUV care evolves as you grow. The medication, monitoring, and surgical options that suit a 16-year-old often need to be revisited at 25, 40, and beyond. We build a long-term partnership with our patients to make sure care adapts as your needs change.
Other Treatments
A small number of treatments relevant to PUV are best delivered in specialist tertiary centres or by other teams. We will coordinate your care and arrange referral where this is appropriate:
Renal Replacement Therapy
Referred to Renal TeamIf kidney function deteriorates to the point where dialysis or transplantation is needed, care is led by an adult renal team. We continue to look after the urological side and work in close partnership with nephrology and transplant colleagues to optimise outcomes.
Complex Paediatric Reconstructive Surgery
Referred to Tertiary CentreMajor reconstructive procedures in younger children — such as bladder augmentation (clam cystoplasty), Mitrofanoff continent diversion, or ileal conduit formation — are highly specialised and best performed in dedicated tertiary reconstructive centres. We coordinate referral and continue to share long-term follow-up.
What to Expect at Your Appointment
Your first appointment in the adolescent PUV clinic is comprehensive and usually lasts around 45 minutes. We deliberately take time to understand the whole story — there is no rush. A typical first visit includes:
Detailed History
A careful review of your childhood treatment, previous operations, current urinary symptoms, infection history, kidney function, and how PUV affects your daily life — at school, at work, with sport, and in relationships.
Examination
A focused urological examination, including assessment of the abdomen, kidneys, bladder, and genitalia. A chaperone is offered for all examinations and there is no pressure to proceed if you would prefer not to.
Baseline Investigations
Most patients have blood tests and a bladder ultrasound at the first visit. Further investigations — urodynamics, MRI, MAG3/DMSA, cystoscopy — are arranged as needed and discussed at follow-up.
Management Plan
By the end of the visit you will leave with a clear, individualised plan — what is being investigated, what treatment is being started or changed, and when you will be seen again. Plans are agreed jointly and you are always involved in the decisions.
If you have records, bring them
Old paediatric clinic letters, operation notes, scan reports, and a list of any current medication are all helpful. Don't worry if you don't have everything — we can request records from your previous hospitals on your behalf.
Meet your Specialists
Assessment and treatment of adolescent and adult posterior urethral valves (PUV) is led by our experienced consultant urologists. Your care will be personally overseen by one of our senior specialists.
Key Takeaways
Posterior urethral valves are a lifelong condition, even after successful childhood ablation. The bladder and kidneys can be affected in adolescence and adulthood, and proactive specialist monitoring is the best way to preserve function and quality of life. If you were treated for PUV as a child and haven't been seen for a while, please reconnect — we are here to help, whatever stage you are at.
Frequently Asked Questions About PUV
The valves themselves are usually ablated (cut) endoscopically in infancy, which relieves the immediate obstruction. However, the bladder and kidneys may have already sustained damage in utero and during early infancy. Many young men with treated PUV go on to develop bladder dysfunction (often called "valve bladder syndrome"), chronic kidney disease, incontinence, voiding difficulties, and recurrent infections. These problems can emerge or worsen during adolescence and adulthood, which is why ongoing specialist follow-up is essential even after a successful childhood operation.
Yes. A significant proportion of patients with treated PUV develop chronic kidney disease, and some progress to dialysis or kidney transplantation in adolescence or early adulthood. The risk depends on the severity of damage at birth and on how well the bladder has been managed over the years. Regular monitoring of kidney function with blood tests (eGFR, creatinine) and imaging allows us to detect changes early and intervene to preserve as much function as possible.
Absolutely. Lifelong follow-up is recommended for everyone treated for PUV in childhood. Bladder and kidney function can change gradually over decades, and problems are much easier to manage when they are picked up early. Our adolescent and adult transitional clinic provides a seamless handover from paediatric services and ensures you continue to be reviewed by a specialist familiar with the long-term consequences of PUV.
Most men with treated PUV are able to father children, although fertility can be reduced in some cases — particularly where there is a history of bladder neck surgery, retrograde ejaculation, or significant kidney impairment. We discuss fertility openly as part of long-term care, and where there are concerns we arrange semen analysis and refer for fertility advice. If kidney function is reduced, planning for pregnancy (with a partner) is also discussed to optimise outcomes for mother and baby.
You are very welcome to reconnect with specialist care at any age. Many young men with PUV drop out of follow-up during the transition from paediatric to adult services, often because they feel well. We see patients regularly who return years later — sometimes with new symptoms, sometimes simply because they want to know how their kidneys and bladder are doing. A single specialist appointment with up-to-date investigations can re-establish a clear picture and put a long-term management plan back in place.
Need Adolescent or Adult PUV Care?
Whether you are transitioning from paediatric services, returning after a gap in follow-up, or experiencing new or changing symptoms, our specialist urology team is here to help. We provide expert assessment, ongoing monitoring and personalised treatment, with a clear plan for your continued care.