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Prune Belly Syndrome

Prune belly syndrome (PBS) — also called Eagle-Barrett or triad syndrome — is a rare congenital disorder (incidence ≈ 1 in 35,000–50,000) defined by the classic triad of abdominal-wall musculature deficiency, urinary-tract dilation, and bilateral cryptorchidism in males.[1] It is among the most complex conditions in transitional urology: survivors require lifelong multidisciplinary urological care that must be deliberately handed off from pediatric to adult providers.[2][3]

For the adult reconstructive and functional urologist, PBS is a problem of a large hypotonic bladder that empties unpredictably, of dilated upper tracts at chronic risk, of fertility limited by cryptorchidism and accessory-gland hypoplasia, and of an abdominal wall whose laxity is both a functional liability and — through abdominoplasty — a lever on voiding efficiency. This article therefore sits within Transitional Urology.

Disease Overview and Spectrum​

PBS is a spectrum disorder, from mild (near-normal life expectancy) to lethal (neonatal pulmonary hypoplasia).[4] The urinary-tract abnormalities include large hypotonic bladders, dilated tortuous megaureters, vesicoureteral reflux (≈ 78%), and hydronephrosis.[5] A histologic study of three PBS fetuses versus seven controls found less smooth muscle, type-III collagen and innervation. These findings help explain the phenotype but do not prove that functional improvement is impossible.[6]

Roughly 30% of neonatal survivors develop CKD or ESRD by childhood/adolescence, and ~17% require renal transplantation.[5] Prognostic markers for renal failure include nadir serum creatinine >0.7 mg/dL, bilaterally abnormal kidneys on imaging, and clinical pyelonephritis.[7]

Renal Function and Transplantation​

Renal preservation is the primary lifelong goal. Pyelonephritis and obstruction are potentially modifiable contributors to later renal decline. This distinction arose from a small historical pathologic series; congenital dysplasia and reduced nephron reserve remain relevant throughout life.[8]

For those reaching ESRD, transplant outcomes are encouraging:

  • A single-center series (13 transplants in 9 patients) reported 5-year graft survival of 90.9%, with lower 15-year survival (38.5%).[9]
  • Australian KRT registry data (37 patients) showed 1-, 5-, and 10-year first-graft survival of 91% / 71% / 51% — equivalent to or better than matched congenital-kidney-disease controls — and peritoneal dialysis was feasible despite the abdominal-wall deficiency.[10]
  • The ESPN/ERA-EDTA registry (88 patients) confirmed graft-loss risk comparable to other CAKUT groups.[11]
  • The distensible abdominal wall can actually facilitate placement of an adult kidney in younger recipients.[12]

Lower Urinary Tract Management​

Bladder dysfunction is the central, evolving challenge. Voiding is highly variable and changes over time: about 44% void spontaneously while 56% require clean intermittent catheterization (CIC) — and that status is not permanent, so serial urodynamic reassessment is essential rather than reliance on symptoms.[13] In the largest urodynamic series (34 patients, 6 months–19 years follow-up), three voiding patterns were described, none correlating with residual volumes.[13]

The study's three flow patterns did not predict residual volumes, so they cannot determine who needs CIC. Use serial PVR, infections, renal/upper-tract findings and, where necessary, pressure-flow assessment. There is no validated universal PBS-specific PVR percentage mandating catheterization.[13] When ongoing drainage is required and feasible, intermittent catheterization generally avoids the burdens of a chronic indwelling catheter; AUA/SUFU support comes from neurogenic, not PBS-specific, evidence.[14] Do not prescribe Valsalva or Credé from the flow-curve shape alone: adjacent EAU neuro-urology guidance cautions against these methods unless urodynamics demonstrate safe pressures.[36]

Surgical and pharmacologic options:

  • Monfort abdominoplasty was associated with improved emptying in a 12-patient series (paired UDS in eight) — PVR fell from 40.3% to 13% of capacity, UTIs from 5.7 to 1.2/year, with better continence and bladder sensation, even without concomitant urinary reconstruction. This suggests a possible functional benefit, but does not establish efficacy of adult revision abdominoplasty.[20]
  • Reduction cystoplasty lowers bladder volume (~52%) and can help in childhood, but long-term capacities re-expand (740–2,300 cc) and it does not reliably improve voiding dynamics — most useful in the pediatric setting.[15][21]
  • Selective ureteral tailoring and reimplantation for severe VUR or upper-tract stasis — guided by longitudinal renal-function studies, not performed empirically.[16][17]
  • Persistently unsafe storage or emptying requires reassessment and specialist treatment. A pressure of 40 cm H₂O is a historical upper-tract risk marker, not a universal PBS threshold or automatic indication for augmentation. Treatment depends on compliance, detrusor activity, drainage and renal trajectory; evidence for neurogenic therapies should not be assumed to establish PUV/PBS-specific benefit.[14][19]

Urodynamic surveillance​

PBS is not automatically neurogenic LUTD. Its adult surveillance is individualized using congenital anatomy, bladder function, infections, reflux and renal status. The AUA/SUFU adult NLUTD schedule can inform discussion, but its categories and intervals are not validated PBS-specific recommendations.[18] Follow renal function and upper tracts regularly, more closely when abnormal; obtain multichannel UDS when pressure/compliance information will change management or deterioration may be clinically silent. Neither congenital megacystis nor prior reconstruction alone establishes a neurogenic high-risk category, and AUA/SUFU does not mandate a universal two-year UDS interval for PBS.[14][18]

Practical point. Voiding status in PBS is dynamic, not static — a patient voiding spontaneously at 15 may need CIC at 25, and vice versa. Survey accordingly.[13]

Reproductive and Sexual Health​

A critical transition-era concern. Most PBS males who underwent orchiopexy reach spontaneous puberty with satisfactory sexual function.[22] However, retrograde ejaculation is common (7 of 9 in one cohort), and late orchiopexy historically produced sexually active but infertile men with azoospermia and elevated FSH.[23]

More recent data are more optimistic — in 15 postpubertal patients (mean orchiopexy age 18 months), motile spermatozoa were found in 4/8 who submitted semen with generally normal hormonal profiles, though prostate hypoplasia (66.6%) and unilateral seminal-vesicle absence (66.6%) were prevalent and likely contribute to infertility.[24] Intracytoplasmic sperm injection (ICSI) has enabled successful pregnancies, and the Australian registry reported 3 PBS men achieving parenthood at a median age of 35.[10][25] Early orchiopexy is advocated; current EAU guidance for undescended testes aims for 6–12 months and by 18 months at the latest, with technique tailored to anatomy and comorbidity.[22][37]

Malignancy Surveillance​

As survival into adulthood improves, malignancy risk becomes increasingly relevant:

  • Testicular malignancy — inherent cryptorchidism carries germ-cell-tumor risk; a retroperitoneal germ cell tumor has been reported.[26]
  • Bladder cancer — advanced bladder cancer has been reported in a 38-year-old PBS patient with a nonaugmented, nondefunctionalized bladder, supporting prompt investigation of new hematuria. A single case does not establish a routine cystoscopic cancer-screening program for all asymptomatic PBS patients.[27]

Patients with prior augmentation or diversion require lifelong annual surveillance (focused history, exam, basic metabolic panel, upper-tract imaging) given metabolic, stone, perforation, and malignancy risk.[14]

Transition Process and Models of Care​

A retrospective congenital neurogenic-bladder transition program reported successful transfer in 76/79 patients deemed ready, among 157 enrolled. Follow-up remained active in 55/76 transferred versus 63/171 adults without formal transition (72.4% vs 36.8%). These selected, nonrandomized groups support coordinated care but do not establish a PBS-specific causal effect.[29] The International Children's Continence Society supports early, developmentally appropriate transition preparation, building self-management, health literacy, and independence via a readiness-checklist approach.[30]

Key elements:

  • Dedicated multidisciplinary clinics with transition coordinators; structured staged models (e.g., T1–T4) with milestone-based progression.[2][28][31]
  • Time alone with the adolescent during consultations to build independence and address confidential issues.[30]
  • Psychosocial-readiness assessment — health literacy and family support are primary predictors of success; address self-esteem, body image (abdominal-wall appearance), and reproductive counseling.[2][32][33]

Barriers mirror the rest of transitional urology: limited patient education, scarce adult-urologist expertise in congenital disease, financial constraints, and geographic disparity.[2][3]

Quality of Life​

PBS profoundly affects health-related quality of life. Children score significantly below healthy controls across all PedsQL domains — physical (66.3 vs 84.4), emotional (68.4 vs 80.9), social (63.1 vs 87.4), and school (53.0 vs 78.6; all p < 0.001) — and caregivers report lower QoL as well.[34] Chronic constipation, pulmonary problems, and orthopedic issues affect over half of survivors, contributing to morbidity beyond the urinary tract.[35] Body-image concerns and the psychosocial weight of infertility should be addressed through transition and into adult care.

Lifelong Surveillance​

Illustrative adult schedule adapted from adjacent NLUTD practice, not a validated PBS guideline. Adjust intervals to renal status, anatomy and changes; pediatric care may require more frequent assessment.

DomainHigh-risk PBSModerate-risk PBS
History / exam / symptomsAnnualAnnual[18]
Renal function (Cr / GFR)AnnualAnnual[18]
Upper-tract imaging (US)AnnualEvery 1–2 years[18]
UrodynamicsWhen pressure/compliance information changes managementSymptom-triggered[14][18]
PVREach visitEach visit[18]
UTI / hematuriaEach visitEach visit[27]
Metabolic panel (if bowel reconstruction)AnnualAnnual[14]
Fertility / sexual healthPeriodicallyPeriodically[24]

Key Principles​

  • Renal preservation is the lifelong goal; address infection, obstruction and bladder safety while recognizing persistent congenital renal vulnerability.[8]
  • Bladder emptying is dynamic — combine PVR, symptoms, renal imaging and indicated UDS; the 56% CIC estimate is from one historical 34-patient series.[13]
  • Monfort abdominoplasty has a functional payoff (lower PVR, fewer UTIs), not just an aesthetic one.[20]
  • Unsafe pressure or compliance requires treatment, but no single pressure cut-off automatically mandates augmentation.[14][19]
  • Counsel on fertility early — retrograde ejaculation and accessory-gland hypoplasia are common, but motile sperm (4/8 tested in one series) and ICSI-assisted parenthood are achievable; advocate early orchiopexy.[22][24][25]
  • Transplant outcomes are good (5-yr graft survival ~91%), and even peritoneal dialysis is feasible despite the lax abdominal wall.[9][10]

See Also​

References​

1. Iqbal NS, Jascur TA, Harrison S, et al. "Copy Number Variations in a Population With Prune Belly Syndrome." Am J Med Genet A. 2018;176(11):2276-2283. doi:10.1002/ajmg.a.40476

2. Akdağcık Z, Soytürk S, Sılay MS, et al. "Transitional Urology in Congenital and Neurological Conditions: A Global Review of Structured Care Models and Clinical Outcomes." World J Urol. 2025;43(1):628. doi:10.1007/s00345-025-06021-5

3. Lopez AD, Kalaga I, Copp HL, Shaw NM, Hampson LA. "Transitional Urology: A Comprehensive Review of the Transitional Care Process." Nat Rev Urol. 2026. doi:10.1038/s41585-026-01152-9

4. Bogart MM, Arnold HE, Greer KE. "Prune-Belly Syndrome in Two Children and Review of the Literature." Pediatr Dermatol. 2006;23(4):342-345. doi:10.1111/j.1525-1470.2006.00265.x

5. Seidel NE, Arlen AM, Smith EA, Kirsch AJ. "Clinical Manifestations and Management of Prune-Belly Syndrome in a Large Contemporary Pediatric Population." Urology. 2015;85(1):211-215. doi:10.1016/j.urology.2014.09.029

6. Julio-Junior HR, Costa SF, Costa WS, Sampaio FJB, Favorito LA. "Structural Study of the Bladder in Fetuses With Prune Belly Syndrome." Neurourol Urodyn. 2018;37(1):148-152. doi:10.1002/nau.23327

7. Noh PH, Cooper CS, Winkler AC, et al. "Prognostic Factors for Long-Term Renal Function in Boys With the Prune-Belly Syndrome." J Urol. 1999;162(4):1399-1401.

8. Reinberg Y, Manivel JC, Pettinato G, Gonzalez R. "Development of Renal Failure in Children With the Prune Belly Syndrome." J Urol. 1991;145(5):1017-1019. doi:10.1016/s0022-5347(17)38518-x

9. Haberal HB, Zakri R, Olsburgh J. "Medium and Long-Term Clinical Outcomes of Kidney Transplantation in Patients With Prune Belly Syndrome: A Single-Centre Experience." Urology. 2022;169:245-249. doi:10.1016/j.urology.2022.08.023

10. Curran I, Jose E, Burgess J, et al. "Long-Term Outcomes of Kidney Replacement Therapy in Australians With Prune Belly Syndrome." J Paediatr Child Health. 2025;61(2):191-195. doi:10.1111/jpc.16735

11. Yalcinkaya F, Bonthuis M, Erdogan BD, et al. "Outcomes of Renal Replacement Therapy in Boys With Prune Belly Syndrome: Findings From the ESPN/ERA-EDTA Registry." Pediatr Nephrol. 2018;33(1):117-124. doi:10.1007/s00467-017-3770-9

12. Reinberg Y, Manivel JC, Fryd D, Najarian JS, Gonzalez R. "The Outcome of Renal Transplantation in Children With the Prune Belly Syndrome." J Urol. 1989;142(6):1541-1542. doi:10.1016/s0022-5347(17)39156-5

13. Kinahan TJ, Churchill BM, McLorie GA, Gilmour RF, Khoury AE. "The Efficiency of Bladder Emptying in the Prune Belly Syndrome." J Urol. 1992;148(2 Pt 2):600-603. doi:10.1016/s0022-5347(17)36665-x

14. Ginsberg DA, Boone TB, Cameron AP, et al. "The AUA/SUFU Guideline on Adult Neurogenic Lower Urinary Tract Dysfunction: Treatment and Follow-Up." J Urol. 2021;206(5):1106-1113. doi:10.1097/JU.0000000000002239

15. Fallat ME, Skoog SJ, Belman AB, Eng G, Randolph JG. "The Prune Belly Syndrome: A Comprehensive Approach to Management." J Urol. 1989;142(3):802-805. doi:10.1016/s0022-5347(17)38895-x

16. Dénes FT, Arap MA, Giron AM, Silva FA, Arap S. "Comprehensive Surgical Treatment of Prune Belly Syndrome: 17 Years' Experience With 32 Patients." Urology. 2004;64(4):789-793. doi:10.1016/j.urology.2004.05.053

17. Woodard JR, Zucker I. "Current Management of the Dilated Urinary Tract in Prune Belly Syndrome." Urol Clin North Am. 1990;17(2):407-418.

18. Ginsberg DA, Boone TB, Cameron AP, et al. "The AUA/SUFU Guideline on Adult Neurogenic Lower Urinary Tract Dysfunction: Diagnosis and Evaluation." J Urol. 2021;206(5):1097-1105. doi:10.1097/JU.0000000000002235

19. Penna FJ, Elder JS. "CKD and Bladder Problems in Children." Adv Chronic Kidney Dis. 2011;18(5):362-369. doi:10.1053/j.ackd.2011.08.001

20. Smith CA, Smith EA, Parrott TS, Broecker BH, Woodard JR. "Voiding Function in Patients With the Prune-Belly Syndrome After Monfort Abdominoplasty." J Urol. 1998;159(5):1675-1679. doi:10.1097/00005392-199805000-00089

21. Bukowski TP, Perlmutter AD. "Reduction Cystoplasty in the Prune Belly Syndrome: A Long-Term Followup." J Urol. 1994;152(6 Pt 1):2113-2116. doi:10.1016/s0022-5347(17)32333-9

22. Patil KK, Duffy PG, Woodhouse CR, Ransley PG. "Long-Term Outcome of Fowler-Stephens Orchiopexy in Boys With Prune-Belly Syndrome." J Urol. 2004;171(4):1666-1669. doi:10.1097/01.ju.0000118139.28229.f5

23. Woodhouse CR, Snyder HM. "Testicular and Sexual Function in Adults With Prune Belly Syndrome." J Urol. 1985;133(4):607-609. doi:10.1016/s0022-5347(17)49108-7

24. Lopes RI, Tavares A, Dénes FT, Cocuzza M. "Gonadal Function and Reproductive System Anatomy in Postpubertal Prune-Belly Syndrome Patients." Urology. 2020;145:292-296. doi:10.1016/j.urology.2020.04.124

25. Woodhouse CR. "Prospects for Fertility in Patients Born With Genitourinary Anomalies." J Urol. 2001;165(6 Pt 2):2354-2360. doi:10.1016/S0022-5347(05)66202-7

26. Sayre R, Stephens R, Chonko AM. "Prune Belly Syndrome and Retroperitoneal Germ Cell Tumor." Am J Med. 1986;81(5):895-897. doi:10.1016/0002-9343(86)90364-5

27. Kondo F, Matsumoto F, Suenaga S, et al. "Bladder Cancer in a Long-Term Survivor of the Prune Belly Syndrome." Urology. 2022;161:93-95. doi:10.1016/j.urology.2021.11.028

28. Peycelon M, Misseri R. "The Basics of Transition in Congenital Lifelong Urology." World J Urol. 2021;39(4):993-1001. doi:10.1007/s00345-020-03116-z

29. Blubaum A, Lewis J, Frimberger D, Slobodov G. "9-Year Evaluation of a Transitional Care Program for Congenital Neurogenic Bladder Patients." Urology. 2023;180:285-290. doi:10.1016/j.urology.2023.06.023

30. Bower WF, Christie D, DeGennaro M, et al. "The Transition of Young Adults With Lifelong Urological Needs From Pediatric to Adult Services: An International Children's Continence Society Position Statement." Neurourol Urodyn. 2017;36(3):811-819. doi:10.1002/nau.23039

31. Lewis J, Frimberger D, Haddad E, Slobodov G. "A Framework for Transitioning Patients From Pediatric to Adult Health Settings for Patients With Neurogenic Bladder." Neurourol Urodyn. 2017;36(4):973-978. doi:10.1002/nau.23053

32. Wiener JS, Huck N, Blais AS, et al. "Challenges in Pediatric Urologic Practice: A Lifelong View." World J Urol. 2021;39(4):981-991. doi:10.1007/s00345-020-03203-1

33. Lambert SM. "Transitional Care in Pediatric Urology." Semin Pediatr Surg. 2015;24(2):73-78. doi:10.1053/j.sempedsurg.2015.01.004

34. Arlen AM, Kirsch SS, Seidel NE, et al. "Health-Related Quality of Life in Children With Prune-Belly Syndrome and Their Caregivers." Urology. 2016;87:224-227. doi:10.1016/j.urology.2015.09.028

35. Geary DF, MacLusky IB, Churchill BM, McLorie G. "A Broader Spectrum of Abnormalities in the Prune Belly Syndrome." J Urol. 1986;135(2):324-326. doi:10.1016/s0022-5347(17)45627-8

36. European Association of Urology. EAU Guidelines on Neuro-Urology. 2026. Assisted bladder emptying. Official guideline.

37. European Association of Urology. EAU Guidelines on Paediatric Urology. 2026. Management of undescended testes. Official guideline.