Bladder diverticula in children

Improved bladder diagnostics using multiparametric ultrasound

This comprehensive review examines recent advancements in the integration of multiparametric ultrasound for diagnostic imaging of the urinary bladder. It not only highlights the current state of ultrasound imaging but also projects its potential to further elevate standards of care in managing urinary bladder pathologies. Specifically, contrast-enhanced ultrasound (CEUS) and elastography show significant improvements in detecting bladder tumors and assessing bladder wall mechanics compared to traditional methods. The review also explores the future potential of ultrasound-mediated nanobubble destruction (UMND) as an investigational targeted cancer therapy, showcasing a novel approach that utilizes nanobubbles to deliver therapeutic genes into tumor cells with high precision. Emerging AI-driven innovations and novel techniques, such as microvascular ultrasonography (MVUS), are proving to be powerful tools for the non-invasive and precise management of bladder conditions, offering detailed insights into bladder structure and function. These advancements collectively underscore their transformative impact on the field of urology.

Large bladder diverticulum causing direct extrinsic compression of the left ureter

Bladder diverticula are herniations of the bladder mucosa through the muscular layer and can be congenital or acquired. Acquired bladder diverticula are almost always associated with bladder outlet obstruction. Bladder diverticula are uncommon and often asymptomatic, however, can present with non-specific lower urinary tract symptoms, haematuria, or urinary tract infection. We report a rare case of a large bladder diverticulum causing extrinsic left ureteric compression in a 37-year-old male with a high bladder neck presenting as left flank pain and hydronephrosis. A bladder neck incision successfully resolved voiding symptoms and decompressed the diverticulum leading to resolution of ureteric obstruction.

Ureteral obstruction following transurethral resection of bladder cancer within the Hutch's diverticulum

Here, we report a rare case of bladder cancer within the left congenital periureteral diverticulum, termed the Hutch's diverticulum. Following transurethral resection of the bladder tumor, repeated pyelonephritis was caused by stricture of the diverticulum orifice and ureter. We attempted transurethral dilation and ureteral stenting, but the obstruction did not improve. The patient's renal dysfunction showed gradual progression due to recurrent left pyelonephritis as well as the ureteral obstruction. Therefore, we finally performed a partial cystectomy, involving stricture and ureteral reimplantation. No tumor recurrence was observed over 39 months, and renal dysfunction did not progress following partial cystectomy.

Laparoscopic surgery for female posterior urethral bladder diverticulum with bladder outlet obstruction: A case report

INTRODUCTION

Bladder diverticula (BD) can be classified into congenital and acquired forms, with the latter accounting for approximately 90% of all cases, primarily among male patients. Although BD-associated anatomical bladder outlet obstruction (BOO) is uncommon, existing literature suggests that congenital BD are more frequently observed in male children and rarely in female children. While around 70% of acquired BD are linked to BOO secondary to benign prostatic hyperplasia in male patients, clinical reports of female BD are less common. Furthermore, cases of female BD located posterior to the urethra, which lead to voiding difficulties, are exceedingly rare.

CASE PRESENTATION

Herein, we present a case of laparoscopic treatment in a 53-year-old female patient diagnosed with congenital bladder diverticulum causing progressively worsening dysuria. Voiding cystourethrography revealed a soft cystic protrusion of the posterior urethral wall during voiding, which reinforced the patient's symptoms. Urodynamic examination showed elevated detrusor muscle contraction during voiding, a reduced urinary flow rate, and P/Q values indicative of significant BOO. Considering the patient's clinical condition, we performed laparoscopic bladder diverticulectomy, partial urethral croppingplasty, and cystoplasty.

RESULTS

The laparoscopic bladder diverticulectomy, partial urethral croppingplasty, and cystoplasty procedures were completed thoroughly and with great success. However, complete removal of the diverticular epithelium proved challenging, resulting in an overall operative time of approximately 3 hours and 32 minutes. At the postoperative follow-up, the patient presented with symptoms of a lower urinary tract infection for a week, which were effectively resolved with oral antibiotics. At the 8-month follow-up, the patient reported normal urination and the absence of any discomfort during urination.

CONCLUSION

Female bladder outlet obstruction resulting from posterior urethral BD can be challenging to visualize during transurethral cystoscopy, especially with limited angulation, and may even be overlooked. Furthermore, conventional transvaginal diverticulectomy is often difficult to perform effectively. Therefore, laparoscopic bladder diverticulectomy, partial urethral croppingplasty, and cystoplasty are considered appropriate treatment options for such cases.

A novel endoscopic approach for management of hutch diverticulum concomitant vesicoureteral reflux with dextranomer/hyaluronic acid copolymer injection

INTRODUCTION

There are various treatment options for symptomatic bladder diverticulum, including robotic-assisted laparoscopic bladder diverticulectomy, open and endoscopic techniques. But, to date, the optimal surgical technique remains unclear.

OBJECTIVE

To present the preliminary long-term follow-up results of a novel technique of dextranomer/hyaluronic acid copolymer (Deflux) plus autologous blood injection for correction of hutch diverticulum in patients with concomitant vesicoureteral reflux (VUR).

PATIENT AND METHOD

We retrospectively reviewed four patients who had hutch diverticulum with concomitant VUR and had undergone submucosal Deflux following autologous blood injection. Patients with neurogenic bladder, posterior urethral valve, or voiding dysfunction were excluded from the study. Success was defined as the resolution of the diverticulum, hydronephrosis, and hydroureter on ultrasonography at a 3-month follow-up and long-term symptom-free period.

RESULTS

Four patients with hutch diverticula were included. The median age at the time of surgery was 6.1 (range 3-8) years. Three of them had unilateral VUR, and one had bilateral VUR. During the procedure, a mean of 0.625 ml Deflux plus a mean of 1.25 ml autologous blood were injected submucosally for correction of VUR. Additionally, a mean of 1.62 ml Deflux plus a mean of 1.75 ml autologous blood were injected submucosally to occlude the diverticulum. The median follow-up was 4.6 (range 4-8) years. This method had excellent success in all patients in the current study with no postoperative complications such as febrile urinary tract infection, or diverticulum, hydroureter, or hydronephrosis in follow-up ultrasounds.

CONCLUSIONS

Submucosal injection of Deflux plus autologous blood injection can be a successful endoscopic intervention for treatments of hutch diverticulum in patients with concomitant VUR. Deflux injection can be a simple and cost-effective technique.

[Robot-assisted laparoscopic bladder diverticulum resection (RABDR)]

AIMS

Since October 2018, urinary bladder diverticulum resections at our Department of Urology have been carried out with robot assistance and with minimal invasivion, Paediatrical urological and robot-assisted minimally invasive urological surgery for the Bamberg Social Foundation were performed with the DaVinci robotic system^TM. The aim of the present study was to record the surgical results of our patients and to compare these if necessary with available data on optimal diagnostic and therapy.

METHODS

In this retrospective analysis, we included all patients who received RAHDR between October 2018 and March 2020. The primary endpoints were postoperative blood loss (postoperative haemoglobin decrease), the operation time (min), complications according to the Clavien-Dindo classification, length of hospital stay (days), postoperative residual urine, postoperative urine extravasation at the anastomosis of the bladder, postoperative quality of life and postoperative satisfaction with micturition.

RESULTS

We reviewed a total of 11 patients, all of whom were male. Mean age was 64.8 years (52-82). Average BMI was 26.5 (19-37). 3 patients were ranked with ASA score III, 5 with II and 3 with I. The average residual urine value preoperatively was 183 ml (90-240). A cystogram to rule out extravasation was performed on day 6 postoperatively. The mean duration of surgery was 212 min (148-294) and the mean duration of hospitalisation was 7.6 days (6-10). The mean residual urinary value after surgery was 25 ml (10-60). The mean postoperative maximum of flow was measured at 27.7 ml/s (11-55). No contrast agent extravasation in the cystogram was detected in any of the patients. The complications according to Clavien were not measurable. The mean postoperative haemoglobin decrease was 1.61 g/dl (0-3. 2).

CONCLUSIONS

In most cases, the removal of one or more bladder diverticula is possible using the minimally invasive robotic technique. Various surgeries such as YV-bladder neck plastic, prostate adenoma enucleation, bladder stone restoration, and inguinal herniotomy can be carried out simultaneously. A robot-assisted urinary bladder diverticulum resection is an effective and gentle procedure. However, it must be considered that it brings financial disadvantages due to the lack of adequate representation within the German DRG-system (Diagnosis Related Groups).

Bladder diverticulum caused by primary bladder neck obstruction

Here, we report a case of a patient in their mid 30s who presented with an elevated creatinine and was found to have a massive bladder diverticulum. The patient underwent a robotic-assisted diverticulectomy. They were later found to have a primary bladder neck obstruction on video urodynamics, and subsequently, underwent bladder neck incision, leading to significant improvement in urinary symptoms. Primary bladder neck obstruction is an overlooked cause of bladder diverticulum. While cystoscopy and cross-sectional imaging are frequently used in the initial evaluation of bladder diverticula, in the absence of an anatomic obstruction such as prostate enlargement, video urodynamics should be performed to assess for primary bladder neck obstruction.

Large congenital bladder diverticula in children

OBJECTIVE

Large congenital bladder diverticula (LCBD), congenital bladder diverticula (CBD) larger than 2 cm diameter, is a rare anomaly. The aim of this study was to report long-term surgical and clinical outcomes of children with LCBD.

METHODS

Medical charts of all children who were diagnosed with LCBD at our institution between April 2005 and December 2017, with at least 2 year follow-up were retrospectively reviewed. Patients' demographics, symptoms, operative technique, diverticulum size and localization, surgical outcomes and complications were recorded.

RESULTS

Fourteen patients with 18 LCBD, all male and age between 7 and 240 months (mean age: 53.5 months) were included in the study. Urinary tract infection was the main complaint in 10. Vesicoureteral reflux was detected in eight patients. Diverticula were 2-5.5 cm (mean 3.3 cm) in size. All diverticulectomies were performed transvesically and ureteroneocystostomy was added in 12 patients, 5 of whom were bilateral. No postoperative infection or recurrent reflux were observed. The median follow-up period was 4.5 years (2-12 years).

CONCLUSION

Treatment of LCBD is mostly surgical and transvesical approach for diverticulectomy was found to be a safe and effective surgical procedure in long term follow-up.

Bilateral Hutch diverticula in an elderly male: Revelation of an unknown past

Hutch diverticulum is a congenital diverticulum of the urinary bladder, reported infrequently in children and rare amongst adults. We present a 60-year-old male patient with bilateral Hutch diverticula, detected incidentally during an abdominal ultrasound examination performed for blunt abdominal trauma. This rare case highlights an unusual incidental presentation and opportunity to learn how to differentiate it from acquired bladder diverticula. The available treatment options are also discussed varying from simple follow-up to aggressive surgery.

Ehlers-Danlos syndrome with huge bladder diverticulum in pregnancy - A rare and interesting case report

Ehlers-Danlos syndrome (EDS) is one of the commonest inheritable connective tissue disorders (CTD) affecting one in 5000 people globally. The incidence of bladder diverticula (BD) is reported to be 1.7% seen more commonly in children without any bladder outlet obstruction. BD are associated with congenital syndromes, namely, EDS. We report a case of huge BD in pregnancy that became symptomatic as the pregnancy progressed to term with urinary retention, recurrent urinary infections and fetal malpresentation. The patient was taken for elective Lower segment cesarean section (LSCS) wherein intra-operative findings of soft abdominal wall, velvety and jelly-like rectus muscle made us suspect connective tissue disorder. A thorough retrospective evaluation of medical history, physical examination along with orthopedic evaluation led to the diagnosis of EDS. To the best of our knowledge, this is the first case report of EDS with huge BD in pregnancy.

A rare case of bladder diverticulosis

The incidence of bladder diverticula in the pediatric population is unknown as they are often asymptomatic. A minority of cases are a manifestation of a genetic syndrome. Primary diverticula have different features compared to secondary diverticula, which are generally caused by an obstructive or iatrogenic mechanism. This clinical case deals with a rare neonatal finding of bladder diverticulosis with alteration of the bladder, first detected with ultrasound. Voiding cystography and magnetic resonance allowed us to delineate their heterogeneity in size, their distribution in the bladder and to rule out other malformations of the urinary tract. The features of these diverticula focused the diagnosis of cutis laxa syndrome, a rare disease where bladder diverticulosis is only one sign of a more complex disease.

Bilateral Obstructive Uropathy Caused by Congenital Bladder Diverticulum Presenting as Hypertensive Retinopathy

A congenital bladder diverticulum (CBD) is caused by inherent muscular weakness instead of obstruction of the bladder outlet. The major clinical conditions are recurrent urinary tract infection (UTI) and voiding dysfunction. This report describes a 15-year-old male adolescent who developed sudden visual disturbance resulting from hypertensive retinopathy. The cause of hypertension was bilateral obstructive uropathy caused by enlarged paraureteral bladder diverticula. After the non-functioning right kidney and ureter and the bilateral diverticula were removed, the left ureter was reimplanted in the bladder. Pathologic findings showed chronic pyelonephritis and partial loss of the bladder musculature in the diverticular wall. This observation indicates that dilated CBD can cause latent UTI, ureteral obstruction, hydronephrosis, and secondary hypertension.

Congenital Bladder Diverticulum in Adults: A Case Report and Review of the Literature

A 37-year-old male patient presented to the emergency department with fever, gross hematuria, and irritative lower urinary tract symptoms. Investigations revealed the presence of a large left bladder diverticulum superior and lateral to the left ureteral orifice without bladder outlet obstruction. Bladder diverticula in adults almost always present in the setting of bladder outlet obstruction. The finding of a congenital bladder diverticulum in an adult represents a rare clinical entity.

Holmium laser enucleation of the prostate is an effective treatment in patients with concomitant bladder diverticula and outlet obstruction

INTRODUCTION

Bladder diverticula can be congenital or secondary to benign prostatic hyperplasia with bladder outlet obstruction, and be a source of high postvoid residuals prompting surgical intervention. We sought to evaluate the outcomes of patients with bladder diverticula undergoing holmium laser enucleation of the prostate (HoLEP) for bladder outlet obstruction.

METHODS

We retrospectively reviewed HoLEP patients with at least one bladder diverticulum at two high volume institutions. All cases were performed in similar fashion. Preoperative, perioperative, and postoperative patient variables were obtained and assessed.

RESULTS

Of 2746 HoLEP patients, 51 were diagnosed with bladder diverticula before surgery. Mean prostate size was 80.8 ± 50.0 g and mean diverticulum size (largest if multiple) was 5.5 ± 2.6 cm. Preoperatively, urinary retention requiring catheterization was present in 28 (55%) patients. In the remainder, mean preoperative AUASI was 19.7, peak flow 7.2 ml/s, and post-void residual (PVR) 365 ml. At most recent follow-up (mean 12.2 months), mean total AUASI was 8.6, peak flow 27.1 ml/s, and PVR 145 ml with 71, 276, and 221% improvement, respectively. All patients were voiding and none required catheterization. Only three (6%) patients required diverticulectomy at a mean of 15.2 months after HoLEP for the following indications: hematuria (one patient) and urinary retention (two patients).

CONCLUSIONS

HoLEP is an effective method of outlet obstruction treatment in patients with bladder diverticula. Most patients, even with large diverticula, do not require further treatment after the outlet obstruction has been relieved and can avoid more invasive surgical interventions.

A bladder diverticulum model in rabbits

PURPOSE

Shuttling of some of the bladder volume into the bladder diverticulum (BD) can cause urinary retention, lower urinary tract dysfunction, infection, and stone formation. This experimental study is the first to create a rabbit BD to study micturition physiology (urodynamics and pathology) that mimics clinical findings.

MATERIALS AND METHODS

The study included 16 New Zealand adult male rabbits in the BD group and 16 sham-operated controls. BD creation consisted of a lower midline laparotomy and bladder entry via the spacing between the detrusor muscle fibers and the mucosa, posterolaterally from the bladder wall. The detrusor was excised to provide a mucosal prolapsus, creating a narrow BD neck (Figure). The sham group underwent bladder exposure with a midline incision. All rabbits underwent urodynamic study preoperatively and postoperatively, consisting of postmicturition residue (PMR), maximum bladder capacity (MBC), voiding detrusor pressure (VPdet), filling detrusor pressure (FPdet), compliance, and urine flow (Qflow). The animals were then sacrificed and their bladders assessed for pathology and stone formation.

RESULTS

Preoperative MBC, Pdet, and Qmax were within reference ranges. No animals had PMR or urinary tract infections (UTIs). The BD group showed urodynamic and pathologic bladder changes, including decreased (28%) cystometric bladder capacity and compliance (Sham: 26.8 ± 0.4; BD: 4.46 ± 1.08, p = 0.0001) and increased post-void residual PMR (8.3 ± 2.4 mL). Pathology revealed increased bladder detrusor thickness correlated with urodynamic findings of increased filling detrusor pressures (Sham: 1.58 ± 0.2; BD: 4.89 ± 0.93, p = 0.0001). Urodynamics revealed intermittent BD bladder contraction during the filling phases. Eight BD group rabbits had UTIs; five had stone formation (4-9 mm).

DISCUSSION

In the literature, it has not been determined whether lower urinary tract disorders (LUTD) could cause diverticula, or if a congenital diverticula could be reason for LUTD. Anatomical or neurological reasons for a low-compliance bladder can cause diverticulosis. As demonstrated in our study with rabbits, the congenital diverticulum could further reduce the compliance of the bladder. Further, a decrease in compliance logically correlates with the progressive decompensation of the bladder.

CONCLUSIONS

The nature of diverticula remains undetermined. All the information presented for this model is relevant to our clinical observations. We conclude that the rabbit bladder can be used for research into experimental diverticulum-induced changes in the activity of the bladder and for experimental detrusor research.

The effect of bladder diverticula on bladder function: An experimental study in rabbits

OBJECTIVE

This study aims to evaluate the effect of bladder diverticula (BD) on bladder function using a rabbit model, based on urodynamic findings.

METHODS

A total of 32 New Zealand white rabbits were randomly assigned to four groups: (1) sham surgery; (2) a single, 1-cm-diameter BD; (3) a single, large, 3-cm-diameter BD; and (4) four (multi) 1-cm-diameter BD. Urodynamic evaluations were performed preoperatively, and 1week and 1month postoperatively, to measure the postmicturition residual (PMR), maximum bladder capacity (MBC), filling and voiding detrusor pressure (Pdet), compliance, and unstable detrusor contractions. At the end of the study, the animals were sacrificed and assessed for pathologic evaluation and stone formation.

RESULTS

In groups 3 and 4, the rabbits all had PMR. At 30days postsurgery, the MBC was found to be 28% and 31% lower than the reference range in groups 3 and 4 and compliance was decreased (p<0.05). Further, the filling Pdet was significantly higher for large and multiple BD than in the 1-cm diverticula or sham groups (6.33±1.73, 4±1.26, p=0.0001). Groups 3 (62%) and 4 (50%) had unstable detrusor contractions. There was also a muscular/collagen ratio increase in the large and multiple BD groups. Four rabbits in the large group and one rabbit in the multiple BD group exhibited stone formation.

CONCLUSIONS

Large or multiple BD can alter bladder storage and emptying, and can decrease the capacity of the bladder and reduce its elasticity. Large or multiple bladder diverticula can lead to involuntary contractions, causing dysfunctional voiding.

Primary congenital bladder diverticula: Where does the ureter drain?

BACKGROUND

Primary congenital bladder diverticulum (PCBD) is related to a deficient detrusor layer allowing out-pouching of the bladder mucosa through the inadequate muscularis wall. We aimed to review our experience with symptomatic PCBD in order to correlate clinical findings with anatomical aspects and to present late outcome.

MATERIALS AND METHODS

We reviewed all patients operated in our institution since 2004. We evaluated the charts for complaints, radiological exams, method of treatment, complications and length of follow-up.

RESULTS

We treated 10 cases (11 renal units - [RU]), predominantly males (9/10), mean age at surgery of 5.3 years. All patients had significant urological complaints presenting either with antenatal hydronephrosis (4) or febrile urinary tract infection (5) and urinary retention in one. The ureter was found implanted inside the diverticulum in 8/11 RU. An extravesical psoas-hitch ureteroneocystostomy and diverticulum resection was performed in 10/11 cases, whereas 1 case was treated intravesically based on surgeon's preference without performing cystoscopy. Mean follow-up was 34.1 months (1-120) without complications.

CONCLUSIONS

PCBD is an uncommon diagnosis and has a high probability of drainage inside the diverticulum (72.7%). We recommend the extravesical approach associated with diverticulectomy and ureteroneocystostomy as the preferred technique to treat this abnormality.

[Multiple bladder diverticula caused by occipital horn syndrome]

We report on the case of a child who presented with recurrent, multiple, and voluminous bladder diverticula. Bladder diverticula are defined as a herniation of the mucosa through the bladder muscle or the detrusor. Causes are numerous and diverticula can be classified into primary congenital diverticula (para-ureteral - or Hutch diverticula - and posterolateral diverticula); secondary diverticula (resulting from chronic mechanical obstruction or from neurological disease; and diverticula secondary to connective tissue or muscle fragility. The latter is seen in disease entities such as prune belly syndrome, Ehlers-Danlos syndrome, cutis laxa syndrome, OHS (occipital horn syndrome), Menkes disease, and Williams-Beuren syndrome. In this patient, the cause of these diverticula was OHS, a genetic, recessive X-chromosome-linked syndrome, responsible for abnormal tissue caused by a disorder in copper metabolism. This case reminds us of the importance of pushing the diagnostic workup when presented with multiple and/or large bladder diverticula, and in particular to search for rare malformation syndromes after exclusion of an obstacle.

Current diagnosis and management of primary isolated bladder diverticula in children

INTRODUCTION

Primary isolated bladder diverticula (PIBD) that are not correlated with the UVJ comprise approximately 10% of all primary bladder diverticulas (PBDs). No guidelines have been established for PIBD repair. It is unknown if infections or voiding dysfunction are impacted by the size of diverticula.

PURPOSE

We evaluated the most effective approach to treating PIBD with respect to diverticula size and objective clinical and urodynamic findings.

METHODS

We retrospectively evaluated age, sex, chief complaint, UTI diverticula size, clinical and urodynamic findings, and management of 14 consecutive patients diagnosed with PIBD from 1995 to 2013. Urodynamic studies were performed in all PIBD cases, Post micturition residue (PMR), maximum bladder capacity (MBC), voiding detrusor pressure (Pdet), and pressure flow (Qmax) were all measured. Among patients who underwent surgical repair, resected diverticula wall specimens were sent for pathological evaluation.

RESULTS

Twelve boys and two girls ranging in age from 2 to 15 years (mean, 6.7 years) were included in this study. The mean follow-up duration was 54.2 months (range, 6-120 months). All diverticula were single, and most occurred in posterolateral locations (Figure). In eight patients with PIBD of <3 cm (range, 15-24 mm; mean, 18 mm), MBC, P det, and Qmax were within reference ranges. None of the patients had PMR, and most developed only one urinary tract infection (UTI) before admission. All patients underwent close follow-up without surgical intervention. Six patients had diverticula of >3 cm (range, 32-72 mm; median, 48 mm). Their MBC was lower (72% of predicted value) than the reference range. The P det was significantly higher than that of patients with diverticula of <3 cm and the Q max was lower in two patients. Four patients had PMR, and all patients developed at least three UTIs before admission to the hospital. This group of patients was treated surgically. All operated children reported improvement after in control urodynamic study over follow-up periods.

DISCUSSION

The diverticula layer lacks the contractility that allows the diverticulum to appropriately void into the bladder. This accounts for the urinary retention and dysfunctional voiding. The patients with diverticula larger than 3 cm had PMR. Members of this group had more than three UTIs. In our series, diverticula of >3 cm exhibited an MBC that was lower than the predicted values. The detrusor contracts, but the urine enters the diverticula more easily than it enters the bladder neck. This could inhibit bladder enlargement and may explain the lower MBC in this group. This group also had higher Pdet, and their q max was low. Thus, probably simulating detrusor much higher pressure but undercontractility due to diverticulum. Another possible explanation could be that large PIBD creates a functional obstruction over the bladder neck during voiding.

CONCLUSION

PIBD of >3 cm is characterized by UTI development, functional lower urinary tract symptoms, and disorders of bladder storage or emptying. Surgical repair of these diverticula is associated with improvement of voiding dysfunction and elimination of UTIs.

Management of the bladder and calyceal diverticulum: options in the age of minimally invasive surgery

Bladder and calyceal diverticula are rare clinical entities in the pediatric population. Most of these diverticula are asymptomatic, incidentally detected, and may not require surgical intervention. However, if surgery is indicated, there are minimally invasive treatment options available that have success rates comparable with those of traditional open surgery. In addition, they offer several advantages including reduced morbidity, decreased hospital length of stay, improved cosmesis, and reduced pain medication requirements. In this review, the minimally invasive surgical techniques in the management of bladder and calyceal diverticula are discussed.

A bladder stone within a congenital paraureteral diverticulum: a case report

Paraureteral diverticula are rare in pediatric population. We here present a bladder stone in the congenital paraureteral diverticulum presenting with vesicoureteral reflux. To the best of our knowledge, stone formation in paraureteral diverticulum has not been reported previously. A 5-year-old boy was admitted with the complaint of dysuria. Abdominal ultrasonography revealed a bladder stone in a diverticulum arising from right posterolateral wall and a small right kidney. Voiding cystourethrogram confirmed large bladder diverticulum with vesicoureteral reflux. Cystoscopy revealed a giant stone in the paraureteral diverticulum. The stone was removed with open diverticulectomy and right Cohen ureteroneocystostomy was performed.