Comparison in the incidence of anorectal malformations between a first- and third-world referral center

Global Strategies for Postoperative Care and Bowel Management in Patients With Anorectal Malformations: Varied Practices and Barriers

BACKGROUND

Anorectal malformations (ARMs) commonly result in constipation and fecal incontinence following primary surgical reconstruction. This study investigates global variations in postoperative care and resources.

METHODS

A survey was distributed via the International Pediatric Endosurgery Group (IPEG) and snowball sampling. Geographically, respondents were categorized into high-income countries (HICs) and low-or middle-income countries (LMICs).

RESULTS

233 surveys were received, 64% from LMICs and 36% from HICs. Of these, 51% reported monitoring ARM patients for over a year, while 23% utilized digital technologies. Access to anesthesia for anorectal exams was available to 70% of respondents. Only 29% had established a one-week Bowel Management Program (BMP). Collaboration with urologists and gynecologists was more prevalent in HICs (59%) compared to LMICs (37%, p < 0.01). In HICs, nurses and advanced practice providers were significantly more involved in BMP (71% vs. 39% in LMICs; p < 0.01), and abdominal radiographs for regimen adjustments were used more frequently (80% vs. 69% in LMICs; p = 0.03). Treatment regimens were more varied in HICs, and quality of life tracking was more consistent (19% vs. 9% in LMICs; p = 0.02). LMICs reported significant shortages of medications and equipment (75% vs. 58% in HICs; p = 0.01), inadequate sanitation (48% vs. 24%; p < 0.01), and insufficient insurance coverage (58% vs. 44%; p = 0.04).

CONCLUSIONS

There are notable global disparities in the postoperative care of ARM patients, particularly in BMP protocols and treatment regimens, with LMICs facing severe socioeconomic challenges. This emphasizes the urgent need for targeted strategies and resources to enhance outcomes for ARM patients across different regions.

LEVEL OF EVIDENCE

Level III.

Anorectal malformations

Anorectal malformations (ARM) are rare congenital anomalies with an overall prevalence of 3.32 per 10,000 pregnancies. ARM describe a spectrum of anomalies of the anus and rectum ranging from a minimally displaced anal canal to a complete fusion of the anorectum, vagina and urethra with hypoplastic sphincter and pelvic floor muscle. Aberrant septation of the hindgut with anomalous cloacal membrane during weeks 6 to 9 of gestation form the developmental basis for a spectrum of anomalies defined as ARM. Although underlying specific syndromes and occasional familiar occurrence suggest genetic aetiology, most ARM are non-syndromic and their causal genetic mechanisms and non-genetic insults remain unclear. ARM is a clinical diagnosis, generally made early after birth via careful inspection of the perineum. Prenatal detection remains rare, and modern technical developments have added little to prenatal diagnostics. ARM is corrected surgically. Since its introduction in 1982, posterior sagittal anorectoplasty is the most common surgery for ARM reconstruction. Subsequent surgical adaptations focus on minimizing iatrogenic operative injury by limiting surgical invasiveness. They include laparoscopic procedures and shortening of incisions with confined dissection in open surgery. Although outcomes in patients with ARM have evolved throughout the past decades, there is urgent need for further improvements both in functional outcomes and quality of life. The importance of psychosocial experiences of affected patients is increasingly recognized. Continued research is necessary to improve prenatal detection, to elucidate genetic and epigenetic alterations and to refine optimal surgical procedures.

A Population-Based Cohort Study on Diagnosis and Early Management of Anorectal Malformation in the UK and Ireland

BACKGROUND

This study describes the presentation and initial management of anorectal malformation (ARM); evaluating the frequency, causes and consequences of late diagnosis.

METHODS

A prospective, population cohort study was undertaken for newly diagnosed ARMs in the UK and Ireland from 01/10/2015 and 30/09/2016. Follow-up was completed at one year. Data are presented as n (%), appropriate statistical methods used. Factors associated with late diagnosis; defined as: detection of ARM either following discharge or more than 72 h after birth were assessed with univariable logistic regression.

RESULTS

Twenty six centres reported on 174 cases, 158 of which were classified according to the type of malformation and 154 had completed surgical data. Overall, perineal fistula was the most commonly detected anomaly 43/158 (27%); of the 41 of these children undergoing surgery, 15 (37%) had a stoma formed. 21/154 (14%, CI95{9-20}) patients undergoing surgery experienced post-operative complications. Thirty-nine (22%) were diagnosed late and 12 (7%) were detected >30 days after birth. Factors associated with late diagnosis included female sex (OR 2.06; 1.0-4.26), having a visible perineal opening (OR 2.63; 1.21-5.67) and anomalies leading to visible meconium on the perineum (OR 18.74; 2.47-141.73). 56/174 (32%) had a diagnosis of VACTERL association (vertebral, anorectal, cardiac, tracheal, oesophageal, renal and limb); however, not all infants were investigated for commonly associated anomalies. 51/140 (36%) had a cardiac anomaly detected on echocardiogram.

CONCLUSION

There is room for improvement within the care for infants born with ARM in the UK and Ireland. Upskilling those performing neonatal examination to allow timely diagnosis, instruction of universal screening for associated anomalies and further analysis of the factors leading to clinically unnecessary stoma formation are warranted.

LEVEL OF EVIDENCE

II (Prospective Cohort Study <80% follow-up).

Spatial transcriptomics reveals gene interactions and signaling pathway dynamics in rat embryos with anorectal malformation

Anorectal malformation (ARM) is a prevalent early pregnancy digestive tract anomaly. The intricate anatomy of the embryonic cloaca region makes it challenging for traditional high-throughput sequencing methods to capture location-specific information. Spatial transcriptomics was used to sequence libraries of frozen sections from embryonic rats at gestational days (GD) 14 to 16, covering both normal and ARM cases. Bioinformatics analyses and predictions were performed using methods such as WGCNA, GSEA, and PROGENy. Immunofluorescence staining was used to verify gene expression levels. Gene expression data was obtained with anatomical annotations of clusters, focusing on the cloaca region's location-specific traits. WGCNA revealed gene modules linked to normal and ARM cloacal anatomy development, with cooperation between modules on GD14 and GD15. Differential gene expression profiles and functional enrichment were presented. Notably, protein levels of Pcsk9, Hmgb2, and Sod1 were found to be downregulated in the GD15 ARM hindgut. The PROGENy algorithm predicted the activity and interplay of common signaling pathways in embryonic sections, highlighting their synergistic and complementary effects. A competing endogenous RNA (ceRNA) regulatory network was constructed from whole transcriptome data. Spatial transcriptomics provided location-specific cloaca region gene expression. Diverse bioinformatics analyses deepened our understanding of ARM's molecular interactions, guiding future research and providing insights into gene regulation in ARM development.

Single-stage procedures for anorectal malformations: A systematic review and meta-analysis

BACKGROUND

The purpose of this study is to describe all published studies of single-stage procedures for anorectal malformations and to perform a meta-analysis of studies that compared single-stage to staged procedures.

METHODS

Searches were conducted in Pubmed, Medline, Embase and CENTRAL. Meta-analysis was performed in RevMan and expressed as forest plots with odds ratios (OR) and 95% confidence intervals (CI).

RESULTS

Thirty-eight studies were included in the narrative synthesis. Nine studies were included in the meta-analysis, representing 537 patients. The majority (70%) of patients included in this meta-analysis had either perineal or vestibular fistulas. Surgical site infection (SSI) was defined as any reported infection involving the neoanus (both superficial infection and dehiscence) and occurred in 51 of the 291 patients who underwent single-stage procedures, and 26 of the 244 patients who underwent staged procedure. Meta-analysis showed a 2.2 times higher risk of surgical site infection (SSI) amongst patients who undergo single-stage procedures (OR 2.22, 95% CI 1.26, 3.92). Six of the 293 patients (2%) who underwent single-stage procedures required a rescue ostomy for wound dehiscence. In LMIC the risk of wound dehiscence was three-fold higher in single-stage (36/202) compared to staged procedures (12/126) (OR 3.07, 95% CI 1.42, 6.63). In HIC there was no evidence of an increased risk of wound dehiscence in patients who underwent a single-stage (15/91) compared to a staged procedure (14/118) (OR 1.51, 95% CI 0.65, 3.51). There is no evidence of a difference between single-stage versus staged procedures with regards to functional outcomes including voluntary bowel movements (79/90 versus 111/128), soiling (24/165 versus 20/203) or constipation (27/90 versus 36/128).

CONCLUSION

This systematic review provides further evidence that single-stage procedures for selected patients with anorectal malformations are safe. Whilst there is evidence of an increased risk of SSI, this did not translate to a significant difference in long-term functional outcomes.

LEVELS OF EVIDENCE

Level II.

Global Development of Research on Anorectal Malformations over the Last Five Decades: A Bibliometric Analysis

Purpose: Anorectal malformations (ARM) are one of the most challenging congenital malformations in pediatric surgery. We aimed to assess the research activity on ARM over the last five decades. Methods: Data on original research publications were retrieved from the Web of Science Core Collection (1970–2020), and analyzed for countries, authors, scientific journals, and top-ten papers. Scientific quantity was assessed by the number of publications. Research quality was estimated from the number of citations, average citation rate per item (ACI), and h-index. Results: A total number of 1595 articles with 19,419 citations (ACI = 12.2; h-index = 54) were identified. The annual number of publications and citations significantly increased over time (p < 0.0001). The USA (n = 386; 24.2%), Japan (n = 153; 9.6%), and China (n = 137; 8.6%) were the most productive countries; and the USA (n = 7850; ACI = 20.3; h-index = 44), Japan (n = 1937; ACI = 12.6; h-index = 21), and the Netherlands (n = 1318; ACI = 17.3; h-index = 22) were the top cited countries. Articles were preferentially published in JPS (n = 391; 24.5%), PSI (n = 181; 11.3%), and EJPS (n = 56; 3.5%). Top-ten cited papers focused on classification (n = 1), surgical technique (n = 3), associated syndromes (n = 2), postoperative outcome (n = 3), and basic research (n = 1). Conclusion: This bibliometric study provides valuable insights into the global development of ARM research, and shows that clinical studies and international collaborations dominate in this field.

[Anorectal malformations: a 6-years review at the University Clinics of Lubumbashi]

Les malformations anorectales (MAR) sont des dysgénésies de la filière anogénitale comprenant plusieurs variétés anatomopathologiques. Leur diagnostic précoce permet une prise en charge précoce, laquelle réduit la morbi-mortalité y associée, surtout dans les pays en développement. L´objectif de cette étude est d´analyser les aspects épidémio-cliniques, thérapeutiques et évolutifs des malformations anorectales (MAR) aux Cliniques Universitaires de Lubumbashi. Il s´agit d´une étude descriptive transversale, ayant concerné 24 patients de 0 à 1 an admis dans notre service pour MAR. Sont exclus para cliniques dans notre série, les patients âgés de plus d'une année et non porteurs des examens demandés. Les données ont été recueillies sur base d´une fiche d´enquête reprenant les différents paramètres: l´âge au moment de la consultation, le sexe, le poids de naissance, la circonstance de découverte, la variété anatomique, le type de traitement et évolution des malades. La fréquence était de 24 cas (20,68%) des MAR sur 116 cas des malformations congénitales. L´âge médian était de 2 jours, le sexe-ratio de 1/3 en faveur des filles. L´occlusion intestinale était le diagnostic à l´admission le plus fréquent (50%). Les MAR basses étaient les plus fréquentes (11 patients soit 45,7%) dont 10 sans fistule. L´atrésie intestinale a été la malformation associée la plus fréquente (3 patients). L´anoplastie par abaissement abdomino-périnéal couplée aux dilatations anales postopératoires a été faite chez 13 patients, soit dans 54,1% des cas. Six patients sont décédés de causes inconnues et 6 autres ont été perdus de vues. Pour le résultat fonctionnel, sur les 12 des 24 patients pris en charge qui se sont présentés à la réévaluation 3 mois après sortie de l´hôpital, 3 d´entre eux ont présenté des signes d´incontinence, et 9 d´entre eux étaient continents parmi lesquels 8 étaient diagnostiqués avec MAR basse et 1 avec MAR haute. Les MAR sont une réalité dans notre milieu, cependant, le diagnostic n´est majoritairement posé qu´au décours des occlusions intestinales. Le taux des décès reste élevé et des mesures devrait être prises pour permettre des évaluations à long terme, lesquelles sont encore difficiles à faire vu le nombre des perdus de vue.

Do social circumstances dictate a change in the setup of an anorectal malformation clinic?

BACKGROUND/PURPOSE

To assess the number of patients seen at the colorectal clinic of a low-to-middle income-country with emphasis on their social circumstances.

METHODS

Between January 2013 and December 2018 we recorded the number of visits to colorectal clinic. From February 2019 prospective data on patients with anorectal malformations (ARMs) focusing on their social conditions (type of housing and sanitation) and HIV-exposure were collected.

RESULTS

At the clinic 452 visits were recorded in 2013, 608 in 2014, 904 in 2016, 1392 in 2017, and 1968 in 2018. The ARM cohort included 100 patients: at the time of delivery the HIV status of 74 mothers was negative, positive in 21, and unknown in 5. None of the HIV-exposed patients seroconverted to HIV positive (average follow-up:39 months). Seventy-four patients live in formal settlements, 23 in informal, and 3 in unknown type. Forty-six patients have inside toilets, 39 outside flushing toilets, 10 outside pit latrines, 2 community toilets, and 3 an unknown sanitation.

CONCLUSIONS

The clinic work-load has increased during the past years. A significant proportion of our patients are HIV-exposed, do not live in formal houses and do not have inside toilets. Tailored strategies for a successful surgical plan and bowel management need to be implemented.

LEVEL OF EVIDENCE

II.

Treating pediatric colorectal patients in low and middle income settings: Creative adaptation to the resources available

Colorectal disease profiles for children in low- and middle-income settings (LMIC) are characterized by late presentation, increased complications and limited follow-up in many cases. There is a high prevalence of infectious conditions causing secondary colorectal disease such as Mycobacterium Tuberculosis(TB), Human Immunodeficiency Virus(HIV) and Human Papilloma Virus(HPV), which also impact the management of other primary colorectal conditions, such as wound-healing and intestinal anastomosis. Perineal trauma from sexual assault, motor vehicle or pedestrian accidents, burns, and traditional enemas are commonly encountered and may require adaptation of principles used in treatment of congenital anomalies such as Hirschsprung's disease and Anorectal Malformations for reconstruction. Endemic conditions in certain LMIC require further research to delineate underlying causes and optimize management, such as "African" degenerative visceral leiomyopathy, congenital pouch colon in the Indian subcontinent, and congenital H-type rectal fistulae prevalent in Asia. These unique disease profiles require creative adaptations of resources within poor healthcare infrastructure settings. These special challenges and pitfalls in colorectal care and complications of adverse socioeconomic conditions, are discussed.

Multicenter Study of 342 Anorectal Malformation Patients: Age, Gender, Krickenbeck Subtypes, and Associated Anomalies

INTRODUCTION

 Published studies based on Krickenbeck classification of anorectal malformations (ARMs) are still insufficient to assess the global as well as regional relative incidence of different ARM subtypes, gender distribution, and associated anomalies. The primary purpose of this study was to provide an estimate of those in Global Initiative for Children's Surgery (GICS) research group.

MATERIALS AND METHODS

 We collected ARM data prospectively for 1 year from four institutes of different geographic locations. A total of 342 patients were included in this study (195, 126, 11, and 10 from Bangladesh, Iran, Papua New Guinea, and Oxford, United Kingdom, respectively).

RESULTS

 Overall male to female ratio was 1:1. The most frequent ARM subtype was perineal fistula (23.7% = 81/342). About 48.5% (166/342) patients had at least one associated anomaly. Cardiac and genitourinary systems were the most commonly affected systems, 31.6% (108/342) and 18.4% (63/342), respectively. These organ-systems were followed by anomalies of vertebral/spinal (9.9% = 34/342), musculoskeletal (4.4% = 15/342), and gastrointestinal/abdominal (3.2% = 11/342) systems. Rectovesical fistula had the highest percentage (96.4% = 27/28) of associated anomalies. About 18.1% (62/342) patients had multiple anomalies. ARMs (both isolated and with associated anomalies) occurred equally in males and females. Comparison between patients from Bangladesh and Iran showed differences in relative incidence in ARM subtypes. In addition, Iranian patient group had higher percentage of associated anomalies compared with Bangladeshi (73 vs. 35.4%).

CONCLUSION

 Our study provides important insights about ARM subtypes, gender distribution and associated anomalies based on Krickenbeck classification especially from Bangladesh and Iran.

Constant magnetic field in treating congenital esophageal and anorectal malformation: a review

Background

Congenital esophageal and anorectal malformation are common in neonates. Refractory esophageal anastomotic stricture and abnormal defecation after surgical correction in infants are challenging surgical problems. Magnetic compression anastomosis (MCA) using mated magnets with their interposed compressed tissue may result in serosa-to-serosa apposition.

Data sources

A literature search was performed to establish an algorithm for these accidents by the authors to identify relevant articles published from 1977 to 2019 in Google, Medline, ISI Web of Knowledge Ovid, CNKI and library document delivery, using search terms “magnetics”, “esophageal malformation”, “anorectal” and “perforation”. A total of 24 literatures were collected.

Results

Magnamosis is technically feasible for alimentary tract anastomoses in pediatric patients. The magnets are most commonly made of neodymium–iron–boron and samarium–cobalt alloys, which have been employed to create solid anastomosis for long-gap esophageal atresia and refractory esophageal stricture without thoracotomy in children in recent years. Furthermore, magnamosis can be used for the functional undiversion of ileostomy. In anorectal malformations with favorable anatomy, this procedure may avoid an operative repair such as posterior sagittal reconstruction.

Conclusion

Translumenal anastomosis of digestive tract using the MCA is a reliable, minimally invasive and feasible method to treat congenital esophageal and anorectal malformation.

Megarectosigmoid in anorectal malformations: the role of laparoscopic resection

Surgical treatment for anorectal malformations may lead to chronic constipation or stool incontinence. The first condition is mostly linked to an abnormal dilation of rectum and sigma and it is primarily managed with medical therapy (laxatives, diet and enemas). When medical therapy fails to improve the symptoms, a surgical resection of the dilated colon is advocated. When performing the procedure it is mandatory to consider all the previous operations the patient undergone. We present a laparoscopic left emicolectomy for an extremely dilated megarectosimoid after posterior sagittal anorectoplasty in childhood for a recto-urethral fistula.

Health literacy and health-related quality of life in patients with anorectal malformations: A comparison between a charity hospital in Honduras and a tertiary care center in the United States

BACKGROUND/PURPOSE

We conduct an annual medical mission to Hospital Ruth Paz para Niños Quemados y Cirugía Pediátrica in Honduras to operate on cases of anorectal malformations (ARM). To improve our knowledge of these patients, we compared their health-related quality of life (HRQoL), and the health literacy of their caregivers from this hospital and ours in the United States.

METHODS

The BRIEF Health Literacy Screen (BHLS) and Pediatric Quality of Life Inventory 4.0 (PedsQL) were used, respectively, to assess the health literacy and HRQoL of their guardians. All patients scheduled for an ARM-related operation in October 2016 were eligible for inclusion, and a matched population was selected in Nationwide Children's Hospital, Columbus, Ohio.

RESULTS

The sample comprised 127 patients, with 22 from Honduras and 105, the US. About 13.6% and 80% of Honduran and American caregivers, respectively, had adequate literacy. Honduran and American caregivers of patients aged 12 months and below rated the HRQoL of their children at 87 and 82, respectively; aged between two and four years, at 84 and 77; aged between two and four years, at 85 and 79; and of teens, at 59 and 66. For adults, the rate was 71 and 77 in Honduras and the US, respectively.

CONCLUSION

Although health literacy is extremely low in the Honduran group, its HRQoL was comparable to that of its American counterpart. Improving health literacy by educating caregivers could be an additional goal for medical missions in the future.

LEVEL OF EVIDENCE

Level III.

Anorectal malformations, associated congenital anomalies and their investigation in a South African setting

PURPOSE

This study was undertaken to investigate the types of anorectal malformations (ARM), incidence of associated abnormalities and investigative methods used in patients treated at Red Cross War Memorial Children's Hospital and to determine whether these are in keeping with recent literature. Mortality rates were also reviewed.

METHODS

A retrospective review of patients with ARM between 1993 and 2016 was undertaken. Clinical notes were reviewed and correlated with radiology and cardiac databases. Abnormalities were grouped according to genitourinary, musculoskeletal, gastrointestinal and cardiovascular systems. The data were separated into three periods to ascertain whether the workup strategy had changed over the years.

RESULTS

A total of 282 patients were included. There were 134 (47.5%) high and 116 (41.1%) low lesions and unspecified in 32 (11.3%) patients. There were 59 (20.9%) vestibular fistulae, 46 (16.3%) combined rectourethral fistulae (rectoprostatic, rectobulbar and unspecified rectourethral) and 42 (14.9%) perineal fistulae. Associated abnormalities were detected in 152/221 (69%). Abnormalities were: Genitourinary 88/204 (43.1%), musculoskeletal 80/188 (42.5%), cardiac 44/218 (20.1%) and gastrointestinal 12/216 (5.6%). Twenty patients demised.

CONCLUSION

Vestibular fistulae were most common followed by rectourethral and perineal fistulae. Musculoskeletal and genitourinary abnormalities were the most common associated findings. The mortality rate was 7% and cardiac lesions contributed to mortality. As knowledge of ARM improved, so has awareness of associated malformations. This has led to improved, more active workup, in keeping with the latest literature.