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Anorectal Malformations

Anorectal malformations (ARMs) occur in roughly 1 in 4,000–5,000 live births and span a spectrum from a simple perineal fistula to a complex cloacal malformation.[1] They matter in transitional urology because the urologic burden is lifelong and rises with malformation complexity — yet these patients are among the least systematically transitioned in all of congenital urology.

This page covers the ARM-specific adult and transitional urological problems and the bowel–bladder intersection that defines them. For the general transition framework see Transitional Urology; for the neurogenic-bladder management ladder see Neurogenic Bladder; for the operative detail of catheterizable channels and augmentation see Catheterizable Channels and Bladder Augmentation.

Associated Urologic Anomalies​

Urologic anomalies are present in 50–65% of ARM patients, with prevalence rising in proportion to ARM complexity.[2] Common findings include hydronephrosis, vesicoureteral reflux (VUR), solitary kidney, renal ectopia/fusion, hypospadias, and undescended testes.[2] Males with recto-bladder-neck fistulae and females with cloacal malformations (especially long common channels) carry the highest urologic co-morbidity, and spinal cord anomalies — found in up to 44% — add neurogenic bladder.[2][3] Screening of the urinary tract and spine is therefore mandatory at diagnosis and informs lifelong risk.[3]

Long-Term Urologic Sequelae​

DomainAdult picture
Lower urinary tract dysfunction / incontinenceReported in 1.7–30.5% of adults, far higher in cloacal malformations; neurogenic bladder from spinal anomalies may require CIC or augmentation[4][5]
Renal impairmentHighest with recto-bladder-neck fistulae (renal failure up to 66%); CKD/ESRD and transplantation reported in the cloaca subgroup[4][5]
Recurrent UTISignificantly elevated with low sacral ratios (0.4–0.69)[4]
Sexual / fertilityErectile dysfunction in ~35% of adult males; absent ejaculation/azoospermia in ~15% with rectourethral fistula; delayed coital debut across subtypes; cloacal women report lower QoL and incontinence affecting sexual well-being[6][7][8]
Occult unsafe bladder~30% of asymptomatic males with high ARM have unsafe bladders on urodynamics — screen even without symptoms[9]

The reconstructive/functional urologist's lifelong goals are renal preservation (upper-tract surveillance, especially with VUR, solitary kidney, or prior augmentation), safe low-pressure storage (urodynamics, CIC, neurogenic-bladder management), malignancy surveillance after augmentation, and proactive sexual-health and fertility counseling.[4][9]

The Bowel–Bladder Intersection​

What distinguishes ARM from the other transitional conditions is how tightly bowel and bladder management are coupled — and how often the urologist co-owns both. Patients with concurrent sacral agenesis are the prototype: ~44% require CIC for neurogenic bladder and ~67% require transanal irrigation for bowel management.[10]

This coupling shapes reconstruction:

  • Combined antegrade continence enema (ACE/Malone) + catheterizable bladder channel can be created in a single operation, letting the patient manage both systems through abdominal stomas.[11]
  • For neurogenic bladder refractory to antimuscarinics or botulinum toxin, augmentation cystoplasty is the definitive option, committing the patient to lifelong metabolic and malignancy surveillance per AUA/SUFU.[12]
  • Urodynamic evaluation is recommended for all patients with complex ARM, spinal anomalies, or clinical signs of LUTD — and, given occult unsafe bladders, for high-ARM males regardless of symptoms.[9]

Bowel Management (Urology-Relevant Overview)​

Bowel management is a lifelong, individualized, stepwise endeavor; the reconstructive urologist should understand its logic because it is co-managed with colorectal surgery and shares the catheterizable-channel platform. Before any medical program, surgically correctable causes (stricture, mislocated anus, prolapse, recto-vaginal fistula) must be excluded by contrast enema and examination under anesthesia.[13][18] A contrast enema then separates two phenotypes that drive management:[18][19]

  • Hypomotile / constipation-predominant (dilated colon, paradoxically commoner in "simpler" malformations) → stimulant laxatives ± large-volume enemas.
  • Hypermotile / diarrhea-predominant (non-dilated colon, often after resection) → small-volume saline enemas, anti-motility agents, constipating diet.

Escalation ladder:

  • Stimulant laxative first-line — senna outperformed polyethylene glycol in a randomized crossover trial; stimulants drive peristalsis without liquefying stool (liquid stool is hard to retain in ARM anatomy). Doses are individualized and often well above standard pediatric doses.[18][20][21]
  • High-volume retrograde enemas within a structured bowel-management program when laxatives fail (~38% of patients) — achieving fecal continence in ~70% at one year.[18]
  • Antegrade continence enema (ACE/Malone) for independence or retrograde-enema failure — 71–78% achieve continence, durable at 5 years, with ~25% complication rate (mainly stomal stenosis); failure of retrograde enemas does not predict ACE failure.[18][22][23]
  • Permanent colostomy as last resort — carried by ~12% of one adult ARM cohort.[24]

Psychosocial Burden and Quality of Life​

Successful continence — by any method — is the single strongest modifiable determinant of quality of life in ARM. Adults who are clean score significantly higher on GI-QoL, bowel-function, and SF-36 mental-component scores than those who soil; patients soiling on enemas score roughly 20 points lower than those who are clean.[27][28] Structured bowel-management programs produce clinically meaningful PedsQL gains at one year, with concurrent improvement in voiding dysfunction.[29]

The psychiatric burden is high and under-recognized:

  • 51.9% of adults with congenital colorectal/pelvic malformations carried a psychiatric diagnosis (depression and/or anxiety) and 30.9% a substance-use disorder.[30]
  • Fecal incontinence harms mental health both directly and through reduced self-efficacy; higher self-efficacy and a positive psychological orientation buffer the impact — making self-efficacy a therapeutic target.[31]
  • Stressors are developmentally staged; in adulthood the dominant psychological challenge is psychosexual anxiety and the dominant practical one is navigating complex health systems — a direct consequence of inadequate transition infrastructure.[32][33]

The implication for transitional care is concrete: bowel-management optimization is itself a mental-health intervention, and routine screening for depression, anxiety, and substance use — plus integrated social work and psychology — belongs in every ARM transition model.[30][34]

Transition of Care​

ARM transition is poorly systematized: in an international survey 72% of practitioners had no transition protocol, 82% held no multidisciplinary meeting with adult providers, 33% of centers stopped follow-up before age 10, and 42% felt their patients were not ready to transition.[14] The ARM-Net Consortium recommends beginning transition around age 13–16 with a structured multidisciplinary approach spanning urology, colorectal surgery, gynecology, nephrology, and psychosocial support.[15]

The general transition machinery (readiness tools, joint clinics, coordinators, barriers) is shared across congenital urology — see the Transitional Urology hub.[16][17] Effective ARM-specific solutions are joint pediatric-adult clinics, fostering patient self-advocacy, educating adult providers, and collaborative urology–colorectal–gynecology co-management through the transition window.[25][26]

Key Principles​

  • Urologic anomalies accompany 50–65% of ARMs and scale with complexity; recto-bladder-neck fistula and cloaca carry the highest renal/bladder morbidity, and spinal anomalies (up to 44%) add neurogenic bladder.[2][3]
  • Screen the bladder even when asymptomatic — ~30% of high-ARM males have occult unsafe bladders on urodynamics.[9]
  • Bowel and bladder are coupled — combined ACE + catheterizable channel through abdominal stomas is the reconstructive expression of that coupling.[10][11]
  • Senna is first-line for ARM constipation (it preserves stool consistency); escalate to retrograde enemas, then ACE, then colostomy.[18][20]
  • Continence is the strongest modifiable driver of QoL, and the psychiatric burden (≈ 52% depression/anxiety, ≈ 31% substance use) is high — screen and treat.[28][30]
  • Transition is poorly systematized — most centers lack a protocol; a structured multidisciplinary handoff is the fix.[14][15]

See Also​

References​

1. de Blaauw I, Stenström P, Yamataka A, et al. "Anorectal Malformations." Nat Rev Dis Primers. 2024;10(1):88. doi:10.1038/s41572-024-00574-2

2. Fuchs ME, Halleran DR, Bourgeois T, et al. "Correlation of Anorectal Malformation Complexity and Associated Urologic Abnormalities." J Pediatr Surg. 2021;56(11):1988-1992. doi:10.1016/j.jpedsurg.2021.02.051

3. Duci M, Midrio P, Castagnetti M, et al. "Urinary Tract Anomalies in Patients With Anorectal Malformations: The Role of Screening and Clinical Follow-Up." Urology. 2020;143:216-220. doi:10.1016/j.urology.2020.05.052

4. Reppucci ML, Wehrli LA, Wilcox D, et al. "Patient-Reported Urinary Outcomes in Adult Males With Congenital Colorectal Conditions." Pediatr Surg Int. 2022;38(12):1709-1716. doi:10.1007/s00383-022-05215-x

5. Wehrli LA, Harris KT, Wood DT, et al. "Urological Outcomes in Adult Females Born With Anorectal Malformation or Hirschsprung Disease." Pediatr Surg Int. 2024;40(1):179. doi:10.1007/s00383-024-05766-1

6. Kyrklund K, Taskinen S, Rintala RJ, Pakarinen MP. "Sexual Function, Fertility and Quality of Life After Modern Treatment of Anorectal Malformations." J Urol. 2016;196(6):1741-1746. doi:10.1016/j.juro.2016.08.079

7. Trinidad S, Garrison A, Encisco EM, et al. "Long-Term Male Sexual Function and Fecal Incontinence Outcomes for Adult Patients With Hirschsprung Disease or Anorectal Malformation." J Pediatr Surg. 2023;58(8):1573-1577. doi:10.1016/j.jpedsurg.2023.04.006

8. Ahmad H, Knaus ME, Gasior AC, et al. "Sexual and Reproductive Health Outcomes in Females With Cloacal Malformations and Other Anorectal Malformations." J Pediatr Adolesc Gynecol. 2023;36(2):148-154. doi:10.1016/j.jpag.2022.10.008

9. Binu V, Dash V, Bawa M, Kanojia RP, Samujh R. "Role of Urodynamics in Male Patients of High-Anorectal Malformations: A Prospective Study." Pediatr Surg Int. 2021;37(4):461-468. doi:10.1007/s00383-020-04835-5

10. Theeuwes JN, de Beaufort CMC, McDonald CJ, et al. "Bowel and Bladder Outcomes in Patients With Anorectal Malformations and Sacral Agenesis: A Retrospective Cohort Study." Pediatr Surg Int. 2026;42(1):244. doi:10.1007/s00383-026-06471-x

11. Bischoff A, Bealer J, Peña A. "Controversies in Anorectal Malformations." Lancet Child Adolesc Health. 2017;1(4):323-330. doi:10.1016/S2352-4642(17)30026-3

12. 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

13. Peña A, Guardino K, Tovilla JM, et al. "Bowel Management for Fecal Incontinence in Patients With Anorectal Malformations." J Pediatr Surg. 1998;33(1):133-137. doi:10.1016/s0022-3468(98)90380-3

14. Giuliani S, Decker E, Leva E, Riccipetitoni G, Bagolan P. "Long Term Follow-Up and Transition of Care in Anorectal Malformations: An International Survey." J Pediatr Surg. 2016;51(9):1450-1457. doi:10.1016/j.jpedsurg.2016.03.011

15. Giuliani S, Grano C, Aminoff D, et al. "Transition of Care in Patients With Anorectal Malformations: Consensus by the ARM-net Consortium." J Pediatr Surg. 2017;52(11):1866-1872. doi:10.1016/j.jpedsurg.2017.06.008

16. 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

17. Plascevic J, Shah S, Tan YW. "Transitional Care in Anorectal Malformation and Hirschsprung's Disease: A Systematic Review of Challenges and Solutions." J Pediatr Surg. 2024;59(6):1019-1027. doi:10.1016/j.jpedsurg.2023.10.066

18. Ambartsumyan L. "Medical Management of Anorectal Malformations." Aliment Pharmacol Ther. 2024;60(Suppl 1):S77-S84. doi:10.1111/apt.17897

19. Ambartsumyan L, Patel D, Kapavarapu P, et al. "Evaluation and Management of the Postsurgical Patient With Hirschsprung Disease: Position Paper of the NASPGHAN Neurogastroenterology & Motility Committee." J Pediatr Gastroenterol Nutr. 2023;76(4):533-546. doi:10.1097/MPG.0000000000003717

20. Santos-Jasso KA, Arredondo-García JL, Maza-Vallejos J, Lezama-Del Valle P. "Effectiveness of Senna vs Polyethylene Glycol as Laxative Therapy in Children With Constipation Related to Anorectal Malformation." J Pediatr Surg. 2017;52(1):84-88. doi:10.1016/j.jpedsurg.2016.10.021

21. Nate-Anong B, Khorana J, Chantakhow S, Singhavejsakul J, Tepmalai K. "Sennosides vs Magnesium Hydroxide vs Polyethylene Glycol as a Treatment for Constipation in Anorectal Malformation: A Randomized Crossover Trial." Pediatr Surg Int. 2025;41(1):268. doi:10.1007/s00383-025-06174-9

22. Rangel SJ, Lawal TA, Bischoff A, et al. "The Appendix as a Conduit for Antegrade Continence Enemas in Patients With Anorectal Malformations: Lessons Learned From 163 Cases Treated Over 18 Years." J Pediatr Surg. 2011;46(6):1236-1242. doi:10.1016/j.jpedsurg.2011.03.060

23. Lane R, Comella A, Trajanovska M, King SK. "Long Term Outcomes of the Antegrade Continence Enema in Children With an Anorectal Malformation — A Systematic Review." J Pediatr Surg. 2026;61(8):163203. doi:10.1016/j.jpedsurg.2026.163203

24. Danielson J, Karlbom U, Graf W, Wester T. "Outcome in Adults With Anorectal Malformations in Relation to Modern Classification — Which Patients Do We Need to Follow Beyond Childhood?" J Pediatr Surg. 2017;52(3):463-468. doi:10.1016/j.jpedsurg.2016.10.051

25. Gasior A, Midrio P, Aminoff D, Stanton M. "Ongoing Care for the Patient With an Anorectal Malformation; Transitioning to Adulthood." Semin Pediatr Surg. 2020;29(6):150991. doi:10.1016/j.sempedsurg.2020.150991

26. Skerritt C, DaJusta DG, Fuchs ME, et al. "Long-Term Urologic and Gynecologic Follow-Up and the Importance of Collaboration for Patients With Anorectal Malformations." Semin Pediatr Surg. 2020;29(6):150987. doi:10.1016/j.sempedsurg.2020.150987

27. Wehrli LA, Reppucci ML, De La Torre L, et al. "Gastrointestinal Quality of Life and Bowel Function in Adults Born With Anorectal Malformation and Hirschsprung Disease." Pediatr Surg Int. 2023;39(1):234. doi:10.1007/s00383-023-05516-9

28. Wood RJ, Srinivas S, Trajanovska M, et al. "Patient-Reported Outcomes of Children With an Anorectal Malformation." Ann Surg. 2026;283(6):1106-1111. doi:10.1097/SLA.0000000000006606

29. Wood RJ, Vilanova-Sanchez A, El-Gohary Y, et al. "One-Year Impact of a Bowel Management Program in Treating Fecal Incontinence in Patients With Anorectal Malformations." J Pediatr Surg. 2021;56(10):1689-1693. doi:10.1016/j.jpedsurg.2021.04.029

30. Bilgili UZ, Ore AS, Canizares S, et al. "Understanding the Long-Term Psychosocial and Healthcare Needs of Adults With Congenital Colorectal and Pelvic Malformations." Dis Colon Rectum. 2025. doi:10.1097/DCR.0000000000003951

31. Grano C, Fernandes M, Bucci S, et al. "Self-Efficacy Beliefs, Faecal Incontinence and Health-Related Quality of Life in Patients Born With Anorectal Malformations." Colorectal Dis. 2018;20(8):711-718. doi:10.1111/codi.14259

32. Svetanoff WJ, Kapalu CL, Lopez JJ, et al. "Psychosocial Factors Affecting Quality of Life in Patients With Anorectal Malformation and Hirschsprung Disease — a Qualitative Systematic Review." J Pediatr Surg. 2022;57(3):387-393. doi:10.1016/j.jpedsurg.2021.05.004

33. Rane E, Bloom J, Chan XWC, Harris P. "Anorectal Malformation in Adulthood: A Systematic Review of Biological, Psychological, and Sociological Outcomes and Experiences." Pediatr Surg Int. 2026;42(1):191. doi:10.1007/s00383-026-06424-4

34. Cairo SB, Gasior A, Rollins MD, Rothstein DH. "Challenges in Transition of Care for Patients With Anorectal Malformations: A Systematic Review and Recommendations for Comprehensive Care." Dis Colon Rectum. 2018;61(3):390-399. doi:10.1097/DCR.0000000000001033