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Bladder Diverticulectomy

Bladder diverticulectomy is excision of an acquired bladder diverticulum, usually combined with treatment of the bladder outlet obstruction or neurogenic process that caused it. The goal is to remove a reservoir of stasis that drives infection, stone formation, and incomplete emptying, and in some patients to remove a site of malignancy.[1] For indications, imaging, and the obstruction-first management sequence, see Bladder Diverticula.

Indications​

Diverticulectomy is considered for a diverticulum with persistent attributable symptoms, recurrent urinary tract infection, bladder or diverticular stones, upper-tract deterioration from ureteral involvement, or suspected or confirmed malignancy within the sac, after the underlying outlet or neurogenic cause has been addressed or is being treated concurrently. Diverticulum size alone is not an absolute indication.[1] Most patients with a documented diverticulum are managed without surgery; one large single-institution series operated on only 13.6% of 764 patients, and those selected for surgery were younger and had larger diverticula.[2]

Preoperative Evaluation​

  • Cystoscopy confirms the diverticular neck location and its relationship to the ureteral orifices, and inspects the diverticular lining.
  • Cross-sectional imaging (CT or MR urography) maps diverticulum number, position, wall thickness, and proximity to the ureter, and screens for an intradiverticular mass.
  • Urodynamics characterizes detrusor contractility and voiding pressure when the contribution of the diverticulum versus the underlying outlet or detrusor process is unclear.
  • Urine cytology is obtained when imaging or cystoscopy raises concern for malignancy; a suspicious area should be biopsied rather than excised blindly, because the thin or absent diverticular muscle wall can allow earlier extravesical tumor spread.[3]

Surgical Technique​

Open intravesical approach​

An open transvesical approach has been described as follows. The bladder is distended, for example to approximately 200 mL through an 18-Fr Foley catheter; the diverticular sac can be catheterized and filled separately over a guidewire to aid localization, and the ipsilateral ureter is catheterized when the diverticulum lies close to the ureteral orifice. The bladder mucosa is incised circumferentially about 0.5 cm from the diverticular mouth, and the sac is dissected and excised along the plane between the diverticular wall and its surrounding pseudocapsule. The bladder is closed in two layers and the repair is tested by filling; a urethral catheter (for example 20-22 Fr) is left for postoperative drainage.[1] These are illustrative technique details from one description of the operation, not fixed specifications; actual catheter size, filling volume, and closure technique vary with the diverticulum's size and location and with surgeon preference.

Open surgery has traditionally been favored for complex posterior or multiple diverticula, or when ureteral reimplantation is anticipated because the diverticulum abuts or distorts the ureteral orifice.[1]

Laparoscopic and robotic approaches​

Laparoscopic and robot-assisted diverticulectomy are options for surgeons with appropriate minimally invasive experience, usually through an extravesical dissection of the diverticular neck after bladder distension localizes the sac; some series use concomitant flexible cystoscopy or fluorescence imaging for localization, and some describe an intravesical (transvesical) port approach instead.[4][5][6] A modified internal dissection technique, entering the diverticulum directly rather than dissecting it free externally first, has been reported to shorten operative time substantially compared with external dissection in the same series (median 149 versus 228 minutes).[7]

Concomitant management of bladder outlet obstruction, usually transurethral resection or enucleation of the prostate, is commonly performed either immediately before or at the same setting as robotic diverticulectomy in men with benign prostatic obstruction.[8][9][6]

Robotic series and outcomes​

SeriesPatientsApproachKey perioperative findings
Davidiuk 2015[7]16Robotic, external (11) vs internal (5) dissectionMedian operative time 228 vs 149 minutes; no transfusions or 30-day Clavien 3-4 complications; postvoid residual fell from median 458 to 214 mL and AUA symptom score from mean 18 to 7
Tufek 2016[8]9Robotic with concurrent TURP/PVP for BOOMean operative time 186 minutes, blood loss 71 mL, hospitalization 5 days; all diverticula excised and BOO treated with no reported complications
Giannarini 2022[9]16Robotic, transperitoneal extravesical, with BOO treatment before or concurrentMedian IPSS fell from 25 to 5 and postvoid residual from 195 to 30 mL at 6 months (both p < 0.001); two patients had a 90-day urinary infection requiring prolonged antibiotics
Gibson 2024[6]28 (13 surgeons)Robotic, predominantly transperitoneal extravesicalMean operative time 106 minutes, mean hospital stay 2.67 days; early complications in 14%, mostly Clavien-Dindo grade II; clear margins in 90% of malignant cases

These are retrospective, mostly single-center or multi-surgeon case series without a randomized comparison between open, laparoscopic, and robotic approaches, or between concurrent versus staged outlet treatment.[4][6][7][8][9] No randomized trial establishes a preferred route; selection currently follows diverticulum complexity, surgeon experience and equipment, and whether concurrent outlet surgery is planned.

Transurethral endoscopic treatment​

Transurethral incision of the diverticular neck with fulguration of the lining, usually combined with transurethral treatment of the obstructing prostate, has been used as a lower-morbidity alternative to excision in patients who are poor candidates for a formal diverticulectomy. See Bladder Diverticula for the supporting series and its limitations. This approach does not remove the diverticular wall, so a retained tumor risk and the possibility of worsened emptying from altered bladder hydrodynamics are relevant counseling points.[1][10]

Complications​

  • Urine leak or persistent fistula at the closure site
  • Ureteral injury, particularly when the diverticular neck abuts the ureteral orifice, which may require concomitant ureteral reimplantation
  • Recurrent or persistent diverticulum from incomplete excision
  • Acute urinary retention after an endoscopic-only approach, from the altered bladder hydrodynamics created by opening the diverticular neck[10]
  • Standard risks of the chosen approach: bleeding, infection, and, for the minimally invasive routes, the usual access-related complications

See Also​

References​

1. Ferguson EL, Kaouk JH. Bladder Surgery for Benign Disease. In: Partin AW, Dmochowski RR, Kavoussi LR, Peters CA, eds. Campbell-Walsh-Wein Urology. 13th ed. Elsevier; 2025:2601-2641.

2. DeWitt-Foy ME, Anele UA, Accioly JPE, et al. "Cancer Risk in Bladder Diverticula: A Large Institutional Analysis of Risk and Management." Int Urol Nephrol. 2023;55(3):541-6. doi:10.1007/s11255-022-03447-3

3. Fang CW, Hsieh VC, Huang SK, et al. "A Population-Based Cohort Study Examining the Association of Documented Bladder Diverticulum and Bladder Cancer Risk in Urology Patients." PLoS One. 2019;14(10):e0222875. doi:10.1371/journal.pone.0222875

4. Abdel-Hakim AM, El-Feel A, Abouel-Fettouh H, et al. "Laparoscopic Vesical Diverticulectomy." J Endourol. 2007;21(1):85-9. doi:10.1089/end.2006.0140

5. Khonsari S, Lee DI, Basillote JB, et al. "Intraoperative Catheter Management During Laparoscopic Excision of a Giant Bladder Diverticulum." J Laparoendosc Adv Surg Tech A. 2004;14(1):47-50. doi:10.1089/109264204322862360

6. Gibson D, Shanmugasundaram R, McClintock G, et al. "Robotic-Assisted Bladder Diverticulectomy: Indications, Technique, and Outcomes-A Case Series." J Endourol. 2024;38(10):1013-20. doi:10.1089/end.2024.0209

7. Davidiuk AJ, Meschia C, Young PR, Thiel DD. "Robotic-Assisted Bladder Diverticulectomy: Assessment of Outcomes and Modifications of Technique." Urology. 2015;85(6):1347-51. doi:10.1016/j.urology.2015.02.012

8. Tufek I, Mourmouris P, Argun OB, Öbek C, Keskin MS, Akpinar H, Atug F, Kural AR. "Robot-Assisted Bladder Diverticulectomy With Concurrent Management of Bladder Outlet Obstruction." Urol Int. 2016;96(4):432-7. doi:10.1159/000443799

9. Giannarini G, Rossanese M, Macchione L, Mucciardi G, Crestani A, Ficarra V. "Robot-Assisted Bladder Diverticulectomy Using a Transperitoneal Extravesical Approach." Eur Urol Open Sci. 2022;44:162-8. doi:10.1016/j.euros.2022.08.016

10. Schulze S, Hald T. "Voiding Inability After Transurethral Resection of a Bladder Diverticulum." Scand J Urol Nephrol. 1983;17(3):377-8. doi:10.3109/00365598309182150