Impact of spinal dysraphism on urinary and faecal prognosis in 25 cases of cloacal malformation

Determination of voiding pressure in infants with normal lower urinary tracts: Exploring the possible effect of sacral development

OBJECTIVE

To investigate the association between sacral underdevelopment, as defined by subnormal sacral ratio (SR) measurements, with increased maximum detrusor voiding pressure (P det. Max) in infants.

METHODS

In this 2007-2015 retrospective cohort study, the medical records of all infants who underwent a pyeloplasty due to congenital ureteropelvic junction obstruction were added. Their P det. Max was evaluated through the suprapubic catheter utilized for urinary drainage intraoperatively, without imposing any additional risk of urethral catheterization on the infant. SR was calculated via the plain kidney, ureter, and bladder (KUB) radiography film obtained during the voiding cystourethrogram (VCUG) evaluation before the surgery. Participants were categorized into SR < 0.74 or SR ≥ 0.74. P det. Max was subsequently compared between these two groups.

RESULTS

A total of 45 patients were included in our analysis. Twenty-eight (62.2%) patients had a (SR < 0.74), while 17 (37.8%) had a (SR ≥ 0.74). P det. Max was shown to be significantly higher in the SR < 0.74 compared to the SR ≥ 0.74 group (167.5 ± 60.8 vs. 55.7 ± 17.9 cmH2O, p < 0.001). After adjusting for age and sex, SR remained a significant contributor to P det. Max (p < 0.001). Physiologic detrusor sphincter dyscoordination (PDSD) rate was significantly higher in the SR < 0.74 versus SR ≥ 0.74 group (100.0% vs. 70.6%, respectively; p = 0.005).

CONCLUSION

Lumbosacral underdevelopment, as indicated by subnormal sacral ratios, is associated with sphincter-detrusor dyscoordination, which causes PDSD and can ultimately result in higher P det. Max in infants.

Does sacral ratio have any impact on success rate of biofeedback therapy in children with lower urinary tract dysfunction?

INTRODUCTION

To evaluate the possible impact of patients' sacral ratios (SRs) on response to biofeedback (BF) therapy in pediatric patients with lower urinary tract dysfunction (LUTD).

MATERIALS AND METHODS

In this retrospective cohort conducted from 2016 to 2018 in our tertiary medical center, we included the medical records of all pediatric patients with LUTD who were nominated for BF due to having abnormal uroflowmetry patterns and simultaneous increase in electromyography (EMG) activity. Ten sessions of weekly animated BF were performed for each patient. All patients underwent a complete urological evaluation, uroflowmetry with simultaneous EMG and post-void residual measurement before and after treatment. SRs were calculated based on plain anteroposterior lumbosacral radiographs. Patients were then divided into normal SR (≥0.74) and low SR (<0.74) and outcomes were compared between them.

RESULTS

Of the total 86 patients included in our study, 48 (55.8%) had a normal SR (≥0.74), while 38 (44.2%) had a low SR (<0.74). Our data revealed that BF therapy significantly improved maximum and average urinary flow rates, urine volume, daytime urinary incontinence, enuresis, urinary urgency and constipation; irrespective of the patients' SRs (all P < 0.001). Our between-groups analyses showed that after the completion of BF, the SR ≥ 0.74 group had significantly higher maximum urinary flow rate (mean difference [95%CI]: 7.7 [5.4, 10.0], P < 0.001) (Figure) and urine volume (mean difference [95%CI]: 49.9 [19.5, 80.4], P = 0.002) and significantly lower diurnal urinary incontinence (4.2% vs. 21.1%, P = 0.020), enuresis (4.2% vs. 18.4%, P = 0.040) and constipation (2.1% vs. 23.7%, P = 0.004) compared to the SR < 0.74 group.

DISCUSSION

SR has been proposed as a reliable indicator of bony pelvis growth and subsequent lumbosacral neurodevelopment. Additionally, larger SR values are associated with better postoperative sphincter function in children with urological and anorectal malformations. Our results demonstrated that after completion of BF, the normal SR group had a significantly better improvement of some of the uroflowmetry indicators and LUTD-associated symptoms compared to the low SR group.

CONCLUSION

Our findings implied that although BF therapy is an efficient treatment for children with LUTD, irrespective of their sacral development; children with enhanced sacral development may benefit from better clinical response, especially in terms of LUTD-associated symptoms.

Multi-Institutional Review From the Pediatric Colorectal and Pelvic Learning Consortium of Minor Spinal Cord Dysraphism in the Setting of Anorectal Malformations: Diagnosis, Treatment, and Outcomes

BACKGROUND/RATIONALE

Anorectal malformations (ARM) are associated with congenital anomalies of the spine, but the impact of a minor spinal cord dysraphism (mSCD) on fecal continence in the setting of ARM remains unclear.

MATERIALS/METHODS

A retrospective review was performed utilizing data from the Pediatric Colorectal and Pelvic Learning Consortium (PCPLC) registry. The patient cohort was reviewed for ARM type, mSCD screening/incidence/neurosurgical intervention and age-based BMP utilization.

RESULTS

987 patients with ARM were categorized into mild (38%), moderate (32%) or complex (19%). 694 (70%) had normal spinal (NS) status. 271 (27.5%) patients had mSCD. MRI alone (49%) was the most common screening test for mSCD. US screening had a positive predictive value of 86.3% and a negative predictive value of 67.1%. Surgical intervention rates for mSCD ranged between 13% and 77% at a median age of 0.6-5.2 years. 726 (73.6%) patients were prescribed BMP (74.4% NS, 77.5% mSCD). Laxatives were most utilized BMP in all groups <5yo. ≥5yo, enema utilization increased with ARM complexity independent of spine status (with or without neurosurgical intervention). Neurosurgical intervention did not affect BMP utilization at any age or with any ARM when mSCD was identified.

CONCLUSIONS

MSCD influence on bowel function in the setting ARM remains unclear. No significant impact of mSCD was noted on ARM patient bowel management program utilization. Variability exists within PCPLC site with screening and intervention for mSCD in patients with ARM. Future studies with standardized care may be needed to elucidate the true impact of mSCD on long term patient outcomes in ARM patients.

TYPE OF STUDY

Retrospective Comparative Study.

LEVEL OF EVIDENCE

III.

Reconsidering Diagnosis, Treatment, and Postoperative Care in Children with Cloacal Malformations

Cloacal malformations are among the most complex types of anorectal malformation and are characterized by the urological, genital, and intestinal tracts opening through a single common channel in the perineum. Long-term outcome is affected by multiple factors, which include anatomical variants of the malformation itself, associated anomalies, and the surgical approach. Reconsidering these variables and their influence on "patient important" function might lead to strategies that are more outcome-driven than focused on the creation of normal anatomy. Key outcomes reflect function in each of the involved tracts and the follow-up needed should therefore not only include the classical fields of colorectal surgery and urology but also focus on items such as gynecology, sexuality, family-building, and quality of life as well as other psychological aspects. Involving patients and families in determining optimal treatment strategies and outcome measures could lead to improved outcomes for the individual patient. A strategy to support delivery of personalized care for patients with cloacal malformations by aiming to define the best functional outcomes achievable for any individual, then select the treatment pathway most likely deliver that, with the minimum morbidity and cost, would be attractive. Combining the current therapies with ongoing technological advances such as tissue expansion might be a way to achieve this.

Long-term urological assessment and management of cloaca patients: A single tertiary institution experience

PURPOSE

Preserving renal function and achieving urinary continence are the most important urological goals in the management of cloaca patients. Many prognostic factors have been described, such as the length of the common channel (CC) and urethra, the presence of spinal dysraphism, and associated urological anomalies. The aim of this study was to analyze urinary continence status and need for reconstructive procedures and their correlation with urological risk factors in a series with a long-term follow-up.

MATERIAL AND METHODS

The institutional database of patients with anorectal malformations was reviewed. Patients with cloaca who underwent cloacal reconstructive surgery at our institution between January 1995 and May 2015 and who had a minimum postoperative follow-up of 5 years with complete urological care were included. Urologic and spinal anomalies, length of the CC, renal function, urodynamic study patterns, continence status, and urologic reconstructive surgeries were assessed. A CC was defined as long CC when its measure was longer than 3 cm in the cloacogram and then confirmed by cystoscopy. Descriptive statistical analysis was performed.

RESULTS

Fifty-five cloaca patients with a mean follow-up of 12 years (5-20) were included. A long CC was documented in 38 patients (69%). The sacral ratio (SR) was <0.4 in the AP projection in 30 (54.5%). Urodynamic evaluation revealed an inadequate detrusor contraction pattern in 65.4% of the cases. A CC >3 cm and SR <0.4 were significantly correlated with this urodynamic finding. A total of 50 patients (91%) achieved urinary continence, but only 30.9% had volitional voiding and 56% needed major urological reconstructive surgeries. Eighteen patients (32.7%) were in stage 2 or more of chronic kidney disease (<90 ml/min/1.73 m2) at the last follow-up visit.

CONCLUSION

Cloacal management requires a multidisciplinary and long-term follow-up. Early assessment of prognostic urological factors and accurate stratification of each patient are essential to avoid renal impairment and achieve urinary continence in the future. The length of the common channel and the presence of spinal dysraphism were correlated with the presence of neurovesical dysfunction specifically an abnormal bladder contraction efficiency. A significant number of these patients will need catheterization and reconstructive urinary tract surgeries to attain urinary continence.

TYPE OF STUDY

Retrospective study.

LEVEL OF EVIDENCE

Level 3. Retrospective comparative study.

Comparison of longitudinal and radial characteristics of intra-anal pressures using 3D high-definition anorectal manometry between children with anoretal malformations and functional constipation

BACKGROUND

Pathophysiology of fecal incontinence (FI) in children with anorectal malformations (AM) is not well understood. Standard or high-resolution anorectal manometry (ARM) does not identify radial asymmetry or localize abnormal sphincter function. 3D high-definition anorectal manometry (HDARM) provides detailed topographic and 3D pressure gradient representation of anal canal.

AIMS

To compare intra-anal pressure profiles between children with AM and controls using HDARM and to determine the association between manometric properties and reported predictors of fecal continence (AM type, spinal anomaly, and sacral integrity).

METHODS

HDARM tracings of 30 children with AM and FI referred for ARM were compared with 30 age and sex-matched children with constipation. 2D pressure profiles were used to measure length of high-pressure zone (HPZ). Longitudinal and radial measurements of sphincter pressure at rest and squeeze were taken along each segment in 3D topographic views and compared between groups.

KEY RESULTS

3D measurements demonstrated longitudinal and radial differences between groups along all quadrants of HPZ. At rest, intra-anal pressures were lower along the four segments longitudinally across the anal canal and radially along the quadrants in AM group (P < .01). At squeeze, all quadrant pressures were lower in segments 1-4 in AM group (P < .01). Sensation was abnormal in AM group (P < .01). Intra-anal pressures longitudinally and radially were not associated with predictors of fecal continence.

CONCLUSIONS AND INFERENCES

Children with AM had abnormal sensation and lower pressures longitudinally and radially along all quadrants of anal canal. Manometric properties at rest were not associated with reported predictors of fecal continence.

Spinal dysraphism as a new entity in V.A.C.TE.R.L syndrome, resulting in a novel acronym V.A.C.TE.R.L.S

Anorectal malformation (ARM) is the most common symptom in VACTERL syndrome (vertebral, anal, cardiac, tracheo-esophageal fistula, renal, and limb anomalies). The association of ARM and spinal dysraphisms (DYS) is well documented. We aim to better evaluate children with VACTERL association and ARM, considering the presence or not of DYS. Between 2000 and 2015, 279 children with VACTERL associations were identified in Necker Children's Hospital, Paris. We identified 61 VACTERL children (22%) with ARM. A total of 52 VACTERL children with ARM were included. DYS were identified in 36/52 of cases (69.2%). A total of 33 (63.5%) VACTERL children presented with sphincterial dysfunction. We constated that 28/33 (84.8%) of them had DYS + (p < 0.0001). More children in ARM (DYS +) subgroup are presenting with initial urinary sphincter dysfunction (58 vs 19%, p < 0.009) than ARM (DYS -). We identified 29 lipoma filum in our series, which were not statistically associated with urinary disorders (p = 0.143).Conclusion: We propose to refine the definition of VACTERL association, by adding S as Spinal defect to include it as an integral part of this syndrome, resulting in a novel acronym V.A.C.TE.R.L.S.What is Known:• The VACTERL association: congenital anomalies of the bony vertebral column (V), anorectal malformation (A), congenital cardiopathy (C), tracheo-esophageal defects (TE), renal and urinary tract anomalies (R), and limb malformations (L).• VACTERL children needs a complete appraisal, as early as possible, to adopt the most appropriate therapeutic management.What is New:• Include spine dysraphism (DYS) as a part of this syndrome, resulting in a novel acronym V.A.C.TE.R.L.S.• The significant correlation between VACTERL/DYS and urinary dysfunction requires to investigate the spine cord prenatally.

Bone morphogenetic protein 4 expression in the developing lumbosacral spinal cord of rat embryos with anorectal malformations

Although there are improvements in treatment of anorectal malformations (ARMs), patients can still develop fecal incontinence, constipation, and soiling with loss in quality of life. Recent evidence suggests that malformations in the lumbosacral spinal cord are one of the factors that affect postoperative anorectal function. However, the underlying mechanism that produces these malformations has yet to be elucidated. The bone morphogenetic proteins (BMPs) comprise a large group of highly conserved molecules that are involved in multiple processes and play important roles in the formation, development, and differentiation of the spinal cord. This study was designed to investigate the levels of BMP4 expression in the lumbosacral spinal cord in ARMs rat embryos induced by ethylenethiourea (ETU). Specifically, we assessed the association of BMP4 levels with the maldevelopment of the lumbosacral spinal cord and whether BMP4 acted through the canonical intracellular pathway in embryonic rats with ARMs. BMP4 expression was confirmed with immunohistochemical staining, RT-qPCR and western blot analyses of embryonic day (E) 16, E17, E19 and E21 embryos, moreover Smad1/5 and pSmad1/5 expression were confirmed with western blot analyses at peak time point of BMP4 expression. Our results reveal that BMP4 expression in the lumbosacral spinal cord of ARMs rat embryos is decreased at both the mRNA and protein levels and could decrease the phosphorylation of smad1/5, when compared with their expression levels in normal tissue. These results also suggest that reductions in BMP4 expression were possibly responsible for dysfunction of the lumbosacral spinal cord during late developmental stages in ARMs fetal rats. Taken together, we conclude a role for BMP4 in the pathogenesis of lumbosacral spinal cord maldevelopment in developing ARMs rats.

Long-term urological outcomes in cloacal anomalies

Cloacal anomalies are the most complex and severe form of congenital anorectal malformations (ARM) and urogenital malformations, and it has been well documented that increased severity of ARM leads to worse outcomes. While short-term data on persistent cloaca are available, a paucity of data on long-term outcomes exists, largely because of a lack of uniform terminology, inclusion with other ARM and evolution of the operative technique. On comprehensive review of the published literature on long-term urological outcomes in patients with cloacal anomalies, we found a significant risk of chronic kidney disease and incontinence, however, with improvements in surgical technique, outcomes have improved. Continence often requires intermittent catheterization and in some cases, bladder augmentation. The complexity of cloacal malformations and associated anomalies make long-term multidisciplinary follow-up imperative.

Early urologic considerations in patients with persistent cloaca

Cloacal malformations represent one of the most complex conditions among anorectal malformations. Urologic conditions occur with an increased frequency in cloaca patients compared to patients with other types of ARM. The morbidity of the upper and lower urinary tract dysfunction/malformations at times can be severe; manifested by urinary tract infection, lower urinary tract symptoms, urinary incontinence, chronic kidney disease, and even end stage renal disease. Long-term follow-up of patients with cloaca has described significant chronic kidney disease and end-stage renal disease. Whether this rate of chronic kidney disease is a function of intrinsic renal dysplasia or acquired renal injury from neurogenic bladder is currently unknown. However, it is well known that severe lower urinary tract dysfunction, no matter the etiology, poses significant risk to the upper tracts when untreated. Neonatal assessment of the urinary tract accompanied by early identification of abnormal structure and function is therefore fundamental to minimize the impact of any urologic condition on the child's overall health. Adequate management of any associated bladder dysfunction is essential to preserving renal function, minimizing risk of urinary tract infection, and potentially avoiding need for future reconstructive surgery. This article summarizes our institution's approach to the ongoing early urologic management in patients with cloaca.

Sonographic Evaluation of Fetal Conus Medullaris and Filum Terminale

Background: Sonographic evaluation of the fetal conus medullaris (CM) level is not reproducible. The objectives of this study were to determine the normal position of the fetal CM during pregnancy as well as the normal intradural filum terminale (FT) length and to evaluate their use in detecting tethered cord. Methods: This is a prospective evaluation of normal singleton pregnancies examined by sonography from 17 weeks of gestation to term. Each sonographer had to identify the top of the first sacral vertebra (S1) to measure the distance between it and the conus extremity (CM-S1 distance). The intradural FT distance was measured with 5- to 8-MHz probes. Results: 194 consecutive pregnant women were included. The CM and intradural FT were demonstrated clearly in 164 (84%) cases. The mean CM-S1 distance was 20.6 mm (range 0.5-42). The mean intradural FT distance was 27.9 mm (range 6.6-49.3). Linear regression analysis showed a significant association between both those distances and gestational age (p < 0.05). In cases of tethered cord, the mean CM-S1 distance and the mean intradural FT distance were both below the 5th percentile. Conclusion: Prenatal evaluation of the CM and the intradural FT is feasible and reproducible and seems useful in detecting tethered cord.