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Pyeloenteric Fistula Repair

This is the surgical-technique atlas for pyeloenteric fistula. For etiology, pathogenesis, clinical presentation, and diagnostic evaluation, see the clinical-conditions page: Pyeloenteric Fistula. This page focuses on the staged management framework, surgical repair options, and outcomes.

Key repair principles:

  • The vast majority of cases involve a non-functional or severely damaged kidney (chronic infection / obstruction) — nephrectomy + primary bowel closure is the historical standard
  • Nephron-sparing options (ureteral stenting, endoscopic clipping, percutaneous fulguration) are viable when the kidney retains function or surgery is contraindicated
  • Successful management is staged and multidisciplinary (urology + GI / colorectal surgery; nutrition support)

Staged Management Framework​

The Shackley protocol for complex entero-urinary fistulas — 100% success with no postoperative deaths in 10 patients:[1]

Stage 1 — Acute stabilization​

  • Sepsis control — broad-spectrum antibiotics; drain abscesses
  • Urinary diversion — percutaneous nephrostomy to decompress the collecting system and divert urine from the fistula[2][3]
  • GI tract diversion — nasogastric decompression, bowel rest, or proximal defunctioning ostomy as needed[1]
  • Nutritional optimization — TPN to correct malnutrition; critical for healing[1][4]
  • Electrolyte / fluid management[4]

Stage 2 — Recovery and planning​

  • Continued nutritional repletion (BMI < 18 has > 2× mortality risk)[5]
  • Radiologic planning of reconstruction
  • Treatment of underlying disease — medical therapy for Crohn's; staging for malignancy
  • Mean time to reconstruction: ~ 5 months (range 1–20 mo)[1]
  • Optimal timing: ≥ 4 mo from last major intervention (allow adhesion maturation); delays beyond 1 yr may increase recurrence risk[5]

Stage 3 — Definitive surgical repair​

Repair Options​

1. Nephrectomy + primary bowel closure — historical standard of care​

Most commonly reported definitive repair.[6][7] Indicated when:

  • Affected kidney is non-functioning or severely damaged (the majority of cases — chronic infection / obstruction)
  • Underlying renal malignancy
  • Extensive perinephric inflammation precludes kidney-sparing repair

Procedure:

  1. Mobilize and excise the fistula tract
  2. Nephrectomy — simple or radical depending on etiology
  3. Debride bowel-defect edges
  4. Primary closure of the duodenal / bowel defect in layers
  5. Omental interposition flap between the repair and the nephrectomy bed to reduce recurrence
  6. Drain the operative field

2. Kidney-sparing approaches​

When the kidney retains adequate function:

  • Internal ureteral stenting (percutaneous or intraoperative) with conservative management — diverts urine and allows the tract to heal; reported as a successful alternative to nephrectomy[8]
  • Fistula excision + renal pelvis repair + bowel closure — technically challenging due to inflammation but feasible in select cases
  • Percutaneous nephrostomy alone — as a bridge or definitive diversion in poor surgical candidates

3. Endoscopic / minimally invasive repair (poor surgical candidates)​

  • Endoscopic clipping + endoloop ligation from the duodenal side — Lee 2014 successfully closed a pyeloduodenal fistula in a patient too debilitated for surgery; confirmed closure on follow-up fistulography[3]
  • Percutaneous fulguration of the fistulous tract — Kim 2000 nephroenteric fistula treated successfully with fulguration[9]
  • Over-the-scope clips, endoscopic suturing, tissue sealants — increasingly used for GI fistulas generally; data for pyeloenteric specifically limited[10][11]

4. Bowel resection (fistula from diseased bowel)​

When the fistula originates from diseased bowel (Crohn's, diverticulitis, malignancy):

  • Resection of the diseased bowel segment with primary anastomosis (when feasible) or diversion[12][13]
  • The urinary side of the fistula may heal with catheter drainage alone if the defect is small and the urinary tract is otherwise healthy[14]

Repair Selection by Etiology​

EtiologyPreferred repairNotes
Renal calculi + chronic pyelonephritisNephrectomy + primary duodenal / bowel closureMost common scenario; kidney typically non-functional[6][7]
Renal malignancyRadical nephrectomy ± bowel resectionPrognosis depends on cancer stage[15][16]
Crohn's-related entero-urinary fistulaPreoperative anti-TNF optimization → resection of affected bowel + primary 2-layer closure ± omental patchChen 2023: 57% UTI resolution with optimization; ~4% recurrence post-surgery[12]
Diverticular diseaseResection of diseased colon + primary anastomosisTypically curative[13]
Poor surgical candidate (any etiology)Endoscopic clipping / endoloop / percutaneous fulgurationLee 2014; Kim 2000[3][9]
Functional kidney with small tractInternal ureteral stentingDesmond 1989; Maillet 1987 — 70% upper-tract stent success[8][17]

Outcomes​

  • Staged multidisciplinary approach — 100% successful fistula treatment, no postoperative deaths in the Shackley series[1]
  • Large enteric fistula repair series — 96% fistula-free survival with methodical preoperative optimization and surgical technique[18]
  • Recurrence rates — low when the underlying disease is adequately addressed
  • Timing — wait ≥ 4 mo from the last major intervention to allow adhesions to mature; delays > 1 yr may increase recurrence risk[5]

Key Takeaways​

  • Staged multidisciplinary approach — sepsis control → urinary + GI diversion → nutritional optimization → definitive repair at ~ 5 mo.
  • Nephrectomy + primary bowel closure is the historical standard because the affected kidney is typically non-functional.
  • Kidney-sparing options (ureteral stenting, endoscopic clipping, percutaneous fulguration) are viable in select patients with preserved function or prohibitive surgical risk.
  • Bowel resection is required when the fistula originates from diseased bowel (Crohn's, diverticulitis, malignancy).
  • Crohn's preoperative optimization resolves urinary symptoms in 57% and is associated with low (~ 4%) post-surgical recurrence (Chen 2023).

References​

1. Shackley DC, Brew CJ, Bryden AA, et al. "The staged management of complex entero-urinary fistulae." BJU Int. 2000;86(6):624–629. doi:10.1046/j.1464-410x.2000.00871.x

2. Yu NC, Raman SS, Patel M, Barbaric Z. "Fistulas of the genitourinary tract: a radiologic review." Radiographics. 2004;24(5):1331–1352. doi:10.1148/rg.245035219

3. Lee KN, Hwang IH, Shin MJ, et al. "Pyeloduodenal fistula successfully treated by endoscopic ligation without surgical nephrectomy: case report." J Korean Med Sci. 2014;29(1):141–144. doi:10.3346/jkms.2014.29.1.141

4. González-Pinto I, González EM. "Optimising the treatment of upper gastrointestinal fistulae." Gut. 2001;49 Suppl 4:iv22–31. doi:10.1136/gut.49.suppl_4.iv21

5. Owen RM, Love TP, Perez SD, et al. "Definitive surgical treatment of enterocutaneous fistula: outcomes of a 23-year experience." JAMA Surg. 2013;148(2):118–126. doi:10.1001/2013.jamasurg.153

6. Rodney K, Maxted WC, Pahira JJ. "Pyeloduodenal fistula." Urology. 1983;22(5):536–539. doi:10.1016/0090-4295(83)90237-6

7. Gentile PA, Gualtieri L, Izzo S, et al. "Une liaison dangereuse: spontaneous pyeloduodenal fistula." Dig Dis Sci. 2023;68(4):1106–1111. doi:10.1007/s10620-023-07828-1

8. Desmond JM, Evans SE, Couch A, Morewood DJ. "Pyeloduodenal fistulae: a report of two cases and review of the literature." Clin Radiol. 1989;40(3):267–270. doi:10.1016/s0009-9260(89)80194-1

9. Kim SC, Weiser AC, Nadler RB. "Nephroenteric fistula treated with fulguration of the fistulous tract." J Endourol. 2000;14(5):443–445. doi:10.1089/end.2000.14.443

10. Willingham FF, Buscaglia JM. "Endoscopic management of gastrointestinal leaks and fistulae." Clin Gastroenterol Hepatol. 2015;13(10):1714–1721. doi:10.1016/j.cgh.2015.02.010

11. Cereatti F, Grassia R, Drago A, Conti CB, Donatelli G. "Endoscopic management of gastrointestinal leaks and fistulae: what option do we have?" World J Gastroenterol. 2020;26(29):4198–4217. doi:10.3748/wjg.v26.i29.4198

12. Chen Y, Cao L, Qiu J, et al. "Surgical management and outcome of entero-urinary fistula complicating Crohn's disease: a single center study." World J Surg. 2023;47(12):3365–3372. doi:10.1007/s00268-023-07196-x

13. Cirocco WC, Priolo SR, Golub RW. "Spontaneous ureterocolic fistula: a rare complication of colonic diverticular disease." Am Surg. 1994;60(11):832–835.

14. Ferguson GG, Lee EW, Hunt SR, Ridley CH, Brandes SB. "Management of the bladder during surgical treatment of enterovesical fistulas from benign bowel disease." J Am Coll Surg. 2008;207(4):569–572. doi:10.1016/j.jamcollsurg.2008.05.006

15. Chen CH, Cheng HL, Tong YC, Pan CC. "Spontaneous pyeloduodenal fistula: an unusual presentation in advanced renal transitional cell carcinoma." Urology. 2002;60(2):345. doi:10.1016/s0090-4295(02)01749-1

16. Karamchandani MC, West CF. "Vesicoenteric fistulas." Am J Surg. 1984;147(5):681–683. doi:10.1016/0002-9610(84)90141-7

17. Maillet PJ, Pelle-Francoz D, Leriche A, Leclercq R, Demiaux C. "Fistulas of the upper urinary tract: percutaneous management." J Urol. 1987;138(6):1382–1385. doi:10.1016/s0022-5347(17)43648-2

18. Bannon MP, Heller SF, Rivera M, et al. "Reconstructive operations for enteric and colonic fistulas: low mortality and recurrence in a single-surgeon series with long follow-up." Surgery. 2019;165(6):1182–1192. doi:10.1016/j.surg.2019.01.020