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Open research questions in Pediatric Urology and Nephrology Studies

55 unresolved questions extracted from the limitations and future-work sections of 299 Pediatric Urology and Nephrology Studies papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • The complexity of MCDK, with varying degrees of renal dysfunction and associated genitourinary abnormalities. The need for individualized management approaches, taking into account the unique characteristics of each case. The potential for long-term complications, such as chronic kidney disease and renal failure.

    Fetal Multicystic Dysplastic Kidney and Its Effect on Post-natal Quality of Life: A Literature Review · 2026 · DOI

  • Technical limitations, particularly the size of access ports and the length of adult-sized instruments relative to the pediatric abdominal cavity. Physiological constraints, especially in infants, due to limited working space and pneumoperitoneum effects.

    What is the optimal approach to pediatric nephrectomy? Open versus minimally invasive surgery: A narrative review · 2026 · DOI

  • The surgical decision-making process can be subjective and challenging. The condition can lead to pelvic dilatation, parenchymal damage, and loss of kidney function over time. There is a need for non-invasive tools to support clinical decisions.

    The Role of Biomarkers in Determining Surgical Indications and Follow-up of Congenital Ureteropelvic Junction Obstruction · 2026 · DOI

  • High cost of instrumentation in minimal invasive procedures. Need to improve the cost-effectiveness of surgeries. Need to reduce the workload without compromising diagnostic safety.

    Cost and benefit analysis of routine histopathological examination of the pelviureteric junction in pediatric pyeloplasty · 2026 · DOI

  • Interobserver variation in the interpretation of UDS. Lack of standardized criteria for evaluating cystometric parameters.

    Interobserver Agreement of Filling Cystometry Parameters in Children With Neurogenic Lower Urinary Tract Dysfunction · 2026 · DOI

  • High-risk operations due to surgical complexity and patient-specific factors. Limited data on comparative studies in transitional urology population. High rates of complications, such as wound infection and venous thromboembolism.

    Surgical Considerations for the Transitional Urologist · 2026 · DOI

  • There is a need for school-based urine screening to facilitate early detection of urinary abnormalities in children. There is a lack of comprehensive data on the prevalence of urinary abnormalities among school children.

    <b>Prevalence and patterns of asymptomatic urinary abnormalities among school children: a prospective cross-sectional screening study.</b> · 2026 · DOI

  • The diagnosis of enterovesical fistula can be challenging. The treatment of intractable diarrhea caused by enterovesical fistula is not well established.

    Intractable Diarrhea due to Enterovesical Fistula Caused by Recurrent Urinary Tract Infection with Bladder Outlet Obstruction: A Rare Clinical Presentation of "Urinary Diarrhea" · 2026 · DOI

  • The challenge of using VCUG as the gold standard for diagnosing and grading vesicoureteral reflux is its invasiveness and radiation exposure. The challenge of using ultrasound as a non-invasive alternative to VCUG is its limited ability to predict vesicoureteral reflux severity. The challenge of developing a unified, multi-parametric ultrasound system for predicting vesicoureteral reflux severity is the need for further research.

    Predictive value of ultrasound findings for high-grade vesicoureteral reflux in children: a retrospective cross-sectional study in Saudi Arabia · 2026 · DOI

  • Future research should aim to validate the findings of this study in a larger population. Future research should aim to develop a unified, multi-parametric ultrasound system for predicting vesicoureteral reflux severity. Future research should aim to evaluate the cost-effectiveness of using ultrasound as a non-invasive alternative to VCUG.

    Predictive value of ultrasound findings for high-grade vesicoureteral reflux in children: a retrospective cross-sectional study in Saudi Arabia · 2026 · DOI

  • The limitations of urine culture in cUTI management pose a challenge. There is a need for more effective diagnostic tools for pediatric cUTIs.

    Efficacy of hc-tNGS for pathogen identification for pediatric cUTIs: a real-world observational study · 2026 · DOI

  • Follow‐up RBUS abnormalities (bladder wall thickening/irregularity, ureteral dilatation, and reported renal scarring) were most frequent in delayed CIC infants; however, these findings are limited by longer imaging follow‐up and likely confounded by indication.

    Institutional Outcomes of Immediate vs Delayed or No Clean Intermittent Catheterization in Infant Neurogenic Bladder · 2026 · DOI

  • ABSTRACT Background Timing of clean intermittent catheterization (CIC) in infants with neurogenic lower urinary tract dysfunction (NLUTD) remains uncertain.

    Institutional Outcomes of Immediate vs Delayed or No Clean Intermittent Catheterization in Infant Neurogenic Bladder · 2026 · DOI

  • This study has several important limitations. Although the Cos- mos database is representative of the United States population with regards to age, race, and ethnicity, it is limited to organiza- tions that use Epic for their electronic health records and opt to contribute data to Cosmos. Thus, there is the potential for selec- tion bias toward patients that seek care at such institutions, and the data might not fully reflect the entire cohort of pediatric pa- tients with cystitis or pyelonephritis in the United States. Addi- tionally, patients who were transferred to pediatric EDs that did not use Epic or were not part of the Cosmos database do not have available data on the antibiotics administered or prescribed. Moreover, ICD-10 codes were used to identify cases of cystitis and pyelonephritis. Relevant cases that were incorrectly coded might thus have been missed. Cases that were miscoded might Pediatric UTI presentations in the ED also have led to incorrect crossover between cystitis and pyelone- phritis. Finally, we were unable to separate out concomitant dis- ease processes or other factors that might have influenced deci- sions about disposition or antibiotic selection.

    Epidemiologic trends in pediatric urinary tract infections in United States emergency departments from 2016 to 2023 · 2026 · DOI

  • The singular anatomic defect associated with PUV leads to a wide spectrum of disease phenotypes. Close clinical surveillance is mandatory to identify early signs of CKD progression and intervene before permanent damage occurs. The limited number and clinical heterogeneity of urine samples from cases with PUV constrained the statistical power.

    Defining the urine proteome in boys with posterior urethral valves: a pilot study · 2026 · DOI

  • The study is a pilot, exploratory study in a small, clinically heterogeneous group of boys with PUV. The limited number and clinical heterogeneity of urine samples from cases with PUV constrained the statistical power. Further studies in a separate, larger PUV cohort are required to determine the generalizability of the findings.

    Defining the urine proteome in boys with posterior urethral valves: a pilot study · 2026 · DOI

  • Current models for predicting breakthrough UTI risk are limited by subjective VUR grading. There is a need for a more objective and reliable method for predicting breakthrough UTI risk.

    Does vesicoureteral reflux severity impact breakthrough UTI risk: a multi-institutional analysis and risk stratification · 2026 · DOI

  • Our findings should be interpreted with several limitations. First, our exclusion criteria removed patients undergoing ureteral reimplantation or endoscopic injection prior to bUTI, which represents a group of children more likely to have worse VUR disease severity or other relative indica- tions. We believe that this would be a minority of patients as most current guidelines recommend surgical intervention in the context of bUTI or recurrent UTIs. Next, patients were censored 12 months after VCUG, and it is possible that some patients may have a “delayed” bUTI thereafter. However, based on current practice, patients who remain UTI-free for one year after diagnosis without additional risk factors are considered candidates for discontinuation. We also note that predicting outcomes more than 1 year from VCUG may pose significant challenges due to changes in risk factors over time, possible interval resolution of VUR, and concurrent comorbidities. Additionally, certain very important covariates were not systematically captured on the databases, specifically method for urine culture sampling (catheterized versus voided sample), circumcision status, medication compliance, presence of renal scarring, bladder volume at onset of reflux, bladder trabeculations, dysfunc- tional voiding, and concurrent bladder and bowel dysfunc- tion (constipation on x-ray or clinically), which can be of value in adding accuracy to the model’s performance. As this study involved a multi-institutional cohort, the included predictors were limited to variables that were readily avail- able at all sites. Definitively, future efforts and iterations of the model will capture these data points for improved prediction of bUTI and other outcomes. Lastly, our sample size is relatively small and is not sufficiently powered for all subgroup analyses that go beyond an exploratory phase. Nevertheless, in the context of pediatric databases, our sam- ple is among one of the large multicenter cohorts for ML in VUR and is adequately powered for the reported primary outcome. Overall, the qVUR model provides modest perfor- mance but given these limitations, is not ready for clinical decision-making independent of a pediatric urologist.

    Does vesicoureteral reflux severity impact breakthrough UTI risk: a multi-institutional analysis and risk stratification · 2026 · DOI

  • There is a lack of studies comparing the long-term outcomes of different bulking agents. The existing literature is limited by small sample sizes and short follow-up periods.

    Permanent versus Biodegradable Bulking Agents for Paediatric Vesicoureteral Reflux · 2026 · DOI

  • There is a need for studies comparing robot-assisted pyeloplasty with open and laparoscopic pyeloplasty in children. There is a lack of data on the cost-effectiveness of robot-assisted pyeloplasty in paediatric populations.

    Robot-Assisted Pyeloplasty in Children Compared with Open and Laparoscopic Pyeloplasty: Initial Results from Slovakia · 2026 · DOI

  • The trials demonstrated some or high risk of bias due to lack of preregistration and incomplete blinding of subjective outcomes. The sample size was limited, with only three randomized controlled trials meeting the inclusion criteria.

    Poster Session 5: Pediatric Urology, Basic Science · 2026 · DOI

  • There is a lack of research on the use of oxygen-rich or ozone-based dressings for wound healing in pediatric patients. The existing literature has not fully explored the effectiveness of these dressings.

    Poster Session 5: Pediatric Urology, Basic Science · 2026 · DOI

  • The need for individualized management approaches for MCDK. The need for long-term follow-up to prevent chronic kidney disease and other complications. The need for a comprehensive analysis of the cost-effectiveness of different management approaches.

    Fetal Multicystic Dysplastic Kidney and Its Effect on Post-natal Quality of Life: A Literature Review · 2026 · DOI

  • The optimal approach to pediatric nephrectomy is unclear. There is a need for a comprehensive review of contemporary evidence on the optimal approach to pediatric nephrectomy.

    What is the optimal approach to pediatric nephrectomy? Open versus minimally invasive surgery: A narrative review · 2026 · DOI

  • The surgical decision-making process is mainly based on imaging findings and clinical evaluations, which can be subjective and challenging. There is a need for non-invasive tools to support clinical decisions in diagnosis, treatment, and follow-up processes.

    The Role of Biomarkers in Determining Surgical Indications and Follow-up of Congenital Ureteropelvic Junction Obstruction · 2026 · DOI

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55 open questions have been extracted from the limitations and future-work passages of 299 Pediatric Urology and Nephrology Studies papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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