Laparoscopically assisted anorectovaginoplasty for selected types of female anorectal malformations

Laparoscopic management of common cloaca: Current status

AIM

This study reviewed the literature on the laparoscopic management of cloaca.

METHODS

A Medline and Embase search was performed for "laparoscopy" and "cloaca." Articles for which full-text in English was not available, duplicate articles, and review articles were excluded. Demographic characteristics, duration of follow-up, length of common channel, postoperative complications, and functional outcomes were analyzed.

RESULTS

The database search retrieved 81 articles after excluding unrelated articles and identified new articles through cross-referencing 14 articles (72 patients) for this review. The rectal pouch was situated below the pubococcygeal (PC) line in three patients. In all other patients, the rectum was located above the PC line. Only the rectal component of the malformation was repaired laparoscopically in 80% (58/72). Fourteen patients underwent laparoscopic mobilization of the rectum and urogenital component. The length of the common channel was more than 3 cm in all these fourteen patients. The most common complication was rectal prolapse (n = 11). Functional evaluation by Krickenbeck scoring system was reported in 32 patients, of which 6/32 (18.75%) had fecal soiling > Grade 2.

DISCUSSION

Until recently, laparoscopy for the common cloaca was almost exclusively used in patients with low urogenital sinus with high rectal pouch. Moreover, only the rectal component was repaired laparoscopically. Recently, laparoscopic rectal mobilization and urogenital separation was described for patients with common channel length ≥3 cm. It has been reported that laparoscopic vaginal mobilization is easy and more complete by this technique and may avoid vaginal replacement in most of these patients with the long common channel. However, only two studies have reported this technique, and its reproducibility and long-term results are still awaited. Another interesting observation was the increasing use of urethral length along with common channel length in determining the appropriate procedure for the patients with common cloaca. Recent studies propose that the urogenital separation technique be preferred over urogenital mobilization in patients with the short urethra. Nonetheless, we still don't have long-term comparative data to demonstrate that the functional outcomes are better with this new algorithm. We conclude that the persistent cloaca needs an individualized approach, and laparoscopy can be utilized to mobilize the high rectum and is also helpful for the urogenital separation in patients with common channel length >3 cm. However, at present, there is no conclusive evidence to support that laparoscopic repair has a better functional outcome than the open approach.

Refinements in surgical techniques for visualized tunnel formation in laparoscopic-assisted anorectoplasty

PURPOSE

Laparoscopic-assisted anorectoplasty (LAARP) is becoming a more popular procedure for anorectal malformation (ARM) repair. However, the conventional technique for creating pull-through tunnel between the perineal skin and the pelvic floor has been criticized as being semi-blind. This study aims to present a refined version of our previously reported clamp introduction technique for visualized tunnel formation in the center of the sphincter muscle complex (SMC) for rectal pull- through for ARMs.

METHODS

A retrospective review was performed for ARM patients who underwent LAARP from Jan 2019 to Jun 2020. Longitudinal muscle tube (LMT) tunnel was created using the clamp-dilator introduction technique: a laparoscopic dilator was used to create a pelvic tunnel within LMT in high ARM, and the clamp introduction under the direct vision technique was performed for creating the perineal tunnel of LMT for both high and intermediate ARMs.

RESULTS

Seventy patients (1-198 days) with high-type (27cases) and intermediate-type (43 cases) ARM underwent LAARP using clamp-dilation introduction technique. No patients suffered from urinary tract injury, recurrent rectourethral fistula, urethral diverticulum and urinary incontinence. One patient suffered from wound infection and rectal retraction which required a redo pull-through on postoperative day 7. Rectal prolapse requiring surgical intervention developed in one patient. Postoperative MRI examination confirmed central placement of the rectum within the LMT in all cases.

CONCLUSION

Our experience demonstrates that a visualized tunnel formation in the LMT center can be achieved by the clamp-dilator introduction technique in LAARP for both high and intermediate ARMs.

Postoperative "complications" following laparoscopic-assisted anorectoplasty: A systematic review

AIM

This study reviewed the literature on the postoperative complications following laparoscopic-assisted anorectoplasty (LAARP).

METHODS

A Medline and Embase search was performed for the terms "anorectal malformation" (ARM) "laparoscopic" and "complication". Articles without English full text, review articles, systematic reviews, case reports, case series < 5 cases and duplicate articles were excluded. Two reviewers independently performed the eligibility assessment and data extraction. Data were collected for type of malformation, surgical technique, postoperative complications and functional outcomes RESULTS: The search retrieved 108 articles, of which 38 met the inclusion criteria and offered 1058 patients for analysis. Rectoprostatic and rectobladder neck fistula were the most common types of ARM in males, whereas it was the common cloaca in females. Analysis of complications demonstrated rectal prolapse (n = 149; 14.08%) being the most prominent, followed by urethral diverticulum (n = 32; 3.02%), anal stenosis (n = 37; 3.49%), recurrent fistula (n = 7; 0.66%) and rectal stricture (n = 4; 0.37%). Krickenbeck classification was used for functional assessment in 638 patients, with fecal soiling grade 2 or > 2 in 79. Data on functional outcome specific to the type of malformation was available for 246 patients: fecal soiling grade 2 or > 2 in 15/94 (15.95%) with rectoprostatic fistula, 26/73 (35.61%) with rectobladder neck fistula, 6/47 (12.76%) with common cloaca, and 1/22 (4.54%) with no fistula.

CONCLUSION

Rectal prolapse, posterior urethral diverticulum and anal stenosis are the most common complications after LAARP. Inconsistent and non-uniform functional assessment and non-availability of information about the sacrum and spine make it difficult to analyze the functional outcome following LAARP.

Laparoscopic-assisted anorectoplasty for intermediate type rectovestibular fistula: a preliminary report

PURPOSE

Laparoscopic-assisted anorectoplasty (LAARP) is considered to benefit the male patients with anorectal malformation (ARM). This study evaluates LAARP management for intermediate type rectovestibular fistula (IRVF) in the female patient with ARM.

METHODS

Twelve patients with IRVF (aged 3-5 months) underwent LAARP from 2017 to 2019 in our institute. LAARP was performed for mobilization of the rectum, visualization and enlargement of the center of the sphincter muscle complex (SMC) from pelvic and perineal aspects, intra-fistula mucosectomy and rectal pull-through in the SMC with the fourchette and the perineal body unattached.

RESULTS

LARRP was performed in all patients without conversion to open procedure. No patient suffered from wound infection, vaginal injury, recurrent fistula and anal stenosis. The parents were satisfied with the appearance of the wound. Rectal prolapse developed in one patient and needed surgical correction. The patients were followed up for a mean of 19.7 months (ranged from 12 to 35 months).

CONCLUSION

Our preliminary experience shows that LAARP offers an alternative method of correction for the IRVF with good visualization of the SMC and may diminish the risks of wound dehiscence and vaginal injury.

Normal anorectal musculatures and changes in anorectal malformation

PURPOSE

We investigated the anorectal musclulature in normal children and anorectal malformations (ARM) to evaluate its role in bowel control mechanism.

METHODS

Pelves of 50 neonates died of ARM-unrelated diseases and 16 patients with anorectal malformations (8 high, 5 intermediate, and 3 low ARMs) were dissected and analyzed.

RESULTS

Normal anorectal musculature was divided into three muscular tubes: the internal sphincter tube (IAST), longitudinal muscle tube (LMT) and transverse muscle tube (TMT). The LMT came from the outer longitudinal smooth muscle fiber of the rectum and the striated muscle fiber of the levator ani, and the TMT composed of the puborectalis and the external anal sphincter. However, in ARM, the IAST was absent and the LMT, the center of the sphincter muscle complex, was only from the levator ani and could be divided into the pelvic portion and the perineal portion. The former, from the upper rim of the puborectalis to the bulbar urethral, became narrowed and dislocated anteriorly near to the posterior urethra in high ARM and rectal pouch in intermediate ARM. The latter, below the bulbar urethra to the anal dimple, was fused to a column both in high and intermediate ARM. The columnar perineal LMT run downwards and then split, penetrated the superficial part of EAS and terminated at the deep aspect of the skin, to form the anal dimple, which represents the center of the perineal LMT from the perineal aspect. The length of the LMT was longer in high and intermediate ARM than the normal neonate. The columnar perineal LMT and narrowed pelvic LMT could be possibly identified by laparoscopic and perineal approaches retrospectively and widened to allow the passage of the rectum through.

CONCLUSIONS

The anorectal musculature in ARM is composed of agenesic LMT and TMT and the narrowed LMT gives anatomical evidence of the center, where the neorectum should pull through.

The effectiveness of digital anal dilatation in preventing anal strictures after anorectal malformation repair

BACKGROUND

Anal dilatation is performed after repair of anorectal malformations(ARMs) and is vital in prevention of anal stricture formation. The ideal protocol utilizes Hegar dilators. In our setup, few parents will acquire Hegar dilators for home based anal dilatation but majority will use fingers as an alternative. The basis of this study was to determine the effectiveness of digital anal dilatations in preventing anal strictures.

MATERIALS AND METHODS

This was a descriptive cross-sectional study carried out at Kenyatta National Hospital (KNH) which recruited children post ARM repair undergoing digital anal dilatation. The diameters of the digits used for anal dilatation were assessed for adequacy using the desired anal size as a reference point. The main outcome variable was the presence of anal strictures. Data were entered in a data collection sheet and analyzed by use of SPSS (V.21.0 Chicago, Illinois). Chi-square test and Fisher's exact test were used to ascertain association among variables. A P-value of less than 0.05 was considered statistically significant.

RESULTS

50 patients with ARM post repair were recruited in the study. The rate of occurrence of anal stricture was 22%. Among the participants with anal strictures, only 27% were compliant to the dilatation regimen while 73% reported noncompliance. The mean diameter(mm) of the dilating digits at the level of the middle phalanx was Index finger (15.4 ± 0.58), middle finger (15.2 ± 0.61), ring finger (14.2 ± 0.71), small finger (12.5 ± 0.91) and thumb (17.6 ± 0.78). 46% of the participants were dilated with appropriately sized digits. The remainder had dilatations done with larger (22%) or smaller digits (32%). Notably, anal strictures occurred in participants who were dilated with inappropriately sized digits (P = 0.001).

CONCLUSION

Digital anal dilatation is safe and effective as a mode of anal dilation in the setting of compliance to a strict dilatation protocol, daily frequency of dilations and use of appropriately sized digits. Owing to the variability in the finger size, we recommend that digits be calibrated and education given to the caregivers on the use of the appropriately sized digit.

LEVEL OF EVIDENCE

Treatment study. Level III.

Anorectal Agenesis with Rectovaginal Fistula: A Rare/Regional Variant

Aims and Objectives:

The anatomical types of female anorectal malformation (ARM) are complex and include several rare and regional variants. The aim of this report is to highlight the diagnosis and management of cases of anorectal agenesis with rectovaginal fistula (RVF).

Materials and Methods:

This is a retrospective chart review of cases of RVF who underwent definitive surgery between November 2000 and September 2016 in a single institution.

Results:

Of the 244 female patients with anorectal anomalies treated in our institution over a 16-year period, there were 15 cases of RVF with anorectal agenesis giving it an incidence of 6%. All cases of RVF with anorectal agenesis presented with absence of anal opening, varying degree of abdominal distension, and history of passage of fecal matter per vaginum. The mean age of presentation was 3 months (newborn to 1 year). Sigmoid colostomy was done in 13 cases. Distal colostogram demonstrated high RVF which was further confirmed by examination under anesthesia (EUA) and endoscopy before definitive surgery. With the posterior sagittal approach, division of the RVF and anorectoplasty was possible in 14 cases; however, one patient required an abdominal mobilization of the colon for pull through due to a very short distal bowel segment. During a mean postoperative follow-up of 5 years, cosmetic and functional results were satisfactory.

Conclusion:

RVF with anorectal agenesis is a rare/regional variant of female ARMs. Clinical examination along with distal colostogram, EUA, and endoscopy clinches the diagnosis. Anorectal reconstruction by posterior sagittal anorectoplasty results in a satisfactory outcome.

Vaginal agenesis and rectovestibular fistula. Experience utilizing distal ileum for the vaginal replacement in these patients, preserving the natural fecal reservoir

BACKGROUND

The association of rectovestibular fistula (RVF) and vaginal agenesis (VA) presents a diagnostic and management challenge. The vaginal replacement is usually performed with rectum or sigmoid, which are the natural fecal reservoirs; thus, the fecal control could be affected. We present our experience utilizing ileum to preserve the rectum and sigmoid.

METHODS

We performed a retrospective study of eight patients with RVF and VA treated from May 2011 to June 2015 at two colorectal centers, at Pittsburgh and Mexico. We recorded the age at diagnosis of VA, treatment, presence of other associated malformations and outcome.

RESULTS

Eight of forty-nine girls with RVF had an associated VA (16.3%). Three patients had a timely diagnosis and five a delayed diagnosis. Six patients were submitted to a vaginal replacement with ileum and achieved fecal control. Two are waiting for surgery.

CONCLUSIONS

A high index of suspicion of vaginal agenesis helps in a timely diagnosis in girls with RVF. The use of ileum allows for preservation of the fecal reservoirs, thus optimizing the chance for fecal control in patients with anorectal malformations.

Cloaca--Historical aspects and terminology

This is a summary of the milestones in the history of the treatment of cloacal malformations. It is based in a comprehensive literature review of the subject, from the early times, followed by a description of the evolution of the surgical maneuvers that were created, to be able to deal with the different anatomical variants of this complex congenital malformation.

Robotic approach to vaginal atresia repair in an adolescent girl

A 9-year-old girl presented to us, after failed perineal approach for vaginal atresia, with abdominal pain. She was thoroughly evaluated and contrast enhanced computed tomographic was done, which revealed absence of lower 1/3^rd of vagina with normal uterus, fallopian tubes and ovaries. There was no associated anomaly. She was successfully managed by a combined robotic and perineal approach. Follow-up after 6 and 12 months revealed large capacious vagina with healthy mucocutaneous junction.

A new approach for persistent cloaca: Laparoscopically assisted anorectoplasty and modified repair of urogenital sinus

PURPOSE

The aim of this study is to describe the surgical technique and evaluate midterm outcomes of the technique: laparoscopically assisted anorectoplasty (LAARP) and modified repair of urogenital sinus.

METHOD

Seven patients with persistent cloaca underwent LAARP and modified repair of urogenital sinus between November 2005 and December 2010. The ages of the patients at the time of operation were 6 months to 15 years. Distal colostogram and micturating cystogram were performed preoperatively to identify the type of persistent cloaca. The rectal pouch was above the pubococcygeal line in all patients. The operations were carried out using 3 trocars. CO2 pressure was maintained at 8-12 mm Hg.

RESULT

Laparoscopically assisted anorectoplasty and modified repair of urogenital sinus were successfully performed in all cases. Mean operation time was 125.7±8.4 minutes (range, 110-135 minutes). Intraoperative blood loss was minimal. There were no intraoperative complications. Follow-up was obtained in all patients. The median follow-up period was 5.7±2.1years (range, 4-9 years). Mucosal prolapse occurred in 2 cases (28.6%). No urethrovaginal fistula, acquired anorectal atresia or urethral injury was observed. Only 1 patient (14.3%) was incontinent of urine occasionally but urine retention or vesicoureteral reflux was not observed. Two patients (28.5%) had 2-4 stools per day but no social problem. Only 1 patient (14.3%) had constipation and required laxatives.

CONCLUSION

Anoplasty, vaginoplasty and urethroplasty can be performed simultaneously in patients with persistent cloaca through LAARP and modified repair of urogenital sinus.

Laparoscopic approach in the management of anorectal malformations

Seventeen years have passed since the first description of the laparoscopic approach for anorectal malformation and approximately 68 articles have been published on the subject. In this review article, we aim to describe the advantages as well as the indications and contraindications of this approach when dealing with each specific type of anorectal malformation, according to what has been described in the literature and to our own experience. The ideal and undisputable indication for laparoscopy remains for cases in which the abdomen needs to be entered to repair the malformation. Only 10% of male patients with anorectal malformation are born with a recto-bladder neck fistula that requires an abdominal approach, this represents an ideal indication for laparoscopy. In females, only the complex cloacae with a common channel length greater than 3 cm are the ones that require a laparotomy; they represent about 30% of the cloacae. However, the repair of this type of cloacae also requires sophisticated and technically demanding maneuvers that have never been done laparoscopically. In cases of recto-urethral prostatic fistulas the malformation can be repaired either way: laparoscopically or posterior sagitally. In all other malformations: recto-perineal fistula, recto-urethral bulbar fistula, anorectal malformation without fistula, rectal atresia, recto-vestibular fistula; no justification for laparoscopy could be found; and in some cases, laparoscopy is contraindicated. In the published reports, there is no evidence supporting the idea that laparoscopic repair results in better functional results when compared with non-laparoscopic operation; there is a tendency to omit information relevant to bowel control such as the characteristics of the sacrum and the presence or absence of tethered cord; and most authors do not compare results between comparable malformations.

Experience with laparoscopic-assisted anorectal pull-through in 25 males with anorectal malformation and rectourethral or rectovesical fistulae: postoperative complications and functional results

INTRODUCTION

LAARP (laparoscopic-assisted anorectal pull-through) has become an established operation for anorectal malformation (ARM) with rectourethral or rectovesical fistula. The aim of this study was to review post-LAARP operation complications and midterm functional results.

METHODS

Between 2003 and 2010, we performed 28 LAARPs in ARM patients with rectourethral or rectovesical fistula. We retrospectively analyzed the clinical outcomes in 25 male patients with rectourethral or vesical fistulae.

RESULT

The mean age of the patients at the time of LAARP was 2.7 ± 1.4 months. The most common ARM type was rectoprostatic urethral fistula (n=16). Few immediate postoperative complications (urinary tract infection (1), ileus (1), and one case of pneumonia) occurred. Rectal mucosal prolapse developed and was excised 6 months later in 13 (52%) patients. Urethral diverticulum occurred in one patient with a rectobulbar urethral fistula. Immediate postoperative high rectal tone developed in six patients during the early study period (2003-2004). Six of the 12 patients older than 3 years had voluntary bowel movement and no soiling.

CONCLUSION

LAARP was a safe procedure. Shorter dissection of rectum in the intra-abdominal space may be helpful in preventing rectal mucosal prolapse. Intermittent rectal tube insertion may be useful for the patient with high rectal tone in the immediate postoperative period. LAARP is not recommended for the bulbar fistula with a long common wall.

Laparoscopic-assisted PSARP - the advantages of combining both techniques for the treatment of anorectal malformations with recto-bladderneck or high prostatic fistulas

AIM

The aim of this study was to present an alternative way to use both the posterior sagittal approach combined with laparoscopy for the repair of select cases of anorectal malformation (ARM).

METHODS

The laparoscopic approach was used for rectal dissection, ligation of the fistula, and division of vessels to pull the rectum down in cases of ARM with recto-bladderneck or high prostatic fistula. The posterior sagittal incision we believe made the perineal portion safer, allowing for rectal tapering when necessary, and for accurate placement of the rectum, anchored in the center of the sphincter.

RESULTS

There were 15 children (recto-bladderneck fistula, n=13 and recto-prostatic fistula, n =2) in this series. There were no urethral injuries, posterior urethral diverticula, or rectal strictures. A laparotomy was needed in two children in order to mobilize a very high rectum. Follow-up ranged from 3 months to 10 years. Clinical results were consistent with our published series for male patients with these types of defects: 5 are fecally incontinent (3 are clean with a bowel management program), 1 is fecally continent, and 9 are too young to assess. Four children suffered rectal mucosal prolapse.

CONCLUSION

The combination of laparoscopy and PSARP represents a useful technical alternative that allows for a safe reconstruction in cases of ARM with recto-bladderneck and in selected high prostatic fistulas.

Fecal and urinary continence after scope-assisted anorectovaginoplasty for female anorectal malformation

AIM

We assessed continence after scope-assisted anorectovaginoplasty (SARVP) for female anorectal malformation (FARM).

METHODS

Five FARM cases were assessed; cases 1 and 2: cloacal malformation; case 3: urogenital sinus, and rectovestibular fistula (RF); case 4: RF, absent vagina, and sacral anomaly; case 5: covered cloacal exstrophy. Treatment was SARVP in all cases, with perineal vaginoplasty (case 1), vagina pull-through (PT) similar to Georgeson's colon PT (case 2), and the use of the native RF/cloaca channel as a vagina (cases 3-5). Continence was assessed pre and postoperatively.

RESULTS

SARVP was performed in the lithotomy position without repositioning. Mean age at surgery was 3.2 (1.7-5.5) years. Current mean age: 8.8 years (range 7.5-12.2). Mean follow-up: 5.7 years. Preoperative continence: fecal: all had stomas; urinary: cases 1 and 2: continent; cases 3-5: incontinent. Postoperative continence: fecal: cases 1-3: continent; case 4: incontinent; case 5: awaiting stoma closure; urinary: cases 1 and 2: continent; cases 3 and 4: incontinent; case 5: continent (intermittent catheterization). Fetal continence evaluation questionnaire (CEQ) scores for cases 1-4 were 7.5, 9, 10, and 2 (maximum score 10, mean 7.1).

CONCLUSION

Scope assistance improves visualization, thus pelvic sphincter dissection/division is minimized with less detrimental impact on postoperative continence.

Vaginal agenesis or distal vaginal atresia associated with anorectal malformations

BACKGROUND

Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome is defined as Müllerian aplasia with vaginal agenesis and uterine remnants. It is commonly associated with renal and sometimes vertebral anomalies. The MRKH syndrome or distal vaginal atresia is sometimes associated with anorectal malformations. The purpose of this study was to describe 7 girls with vaginal agenesis or distal vaginal atresia and an anorectal malformation and review the literature.

METHODS

Seven patients with vaginal agenesis or distal vaginal atresia and anorectal malformation were operated on at 3 pediatric surgical centers in Madrid, Helsinki, and Stockholm. Case records were reviewed, and the previous literature was searched.

RESULTS

Six patients had a reconstruction of the anorectum and vagina during the first year of life. In one case, the vagina was replaced at the time of a redo posterior sagittal anorectoplasty at the age of 11 years. The 4 patients with vaginal agenesis had a sigmoid colovaginoplasty. The 3 patients with a distal vaginal atresia had a vaginal pull-through. Four of the patients needed laxatives or enemas for mild constipation at last follow-up. Short-term gynecologic problems were minor in all patients.

CONCLUSION

Vaginal reconstruction at the time of anorectoplasty results in good short-term outcome. For vaginal agenesis, a primary colovaginoplasty is suggested to be the preferred technique to replace the vagina.

Laparoscopy and its use in the repair of anorectal malformations

INTRODUCTION

Laparoscopy has been used for the treatment of anorectal malformations (ARMs) in an attempt to be less invasive and with the hope that it would result in a better functional outcome. There remains a significant debate about whether these expectations have been fulfilled.

METHODS

Seventeen patients with ARM for whom laparoscopy was used were retrospectively reviewed. Six were operated on primarily by the authors, and 11 cases were referred after a laparoscopic repair performed elsewhere. In addition, a literature review was performed looking for evidence of less invasiveness and improved functional results in patients operated on laparoscopically.

RESULTS

The diagnosis was imperforate anus with a rectobladder neck fistula in our 6 cases with the fistula ligated laparoscopically in each case. In 1 patient, the malformation was repaired entirely using laparoscopic technique. The other 5 patients had a laparoscopically assisted repair because we had to open the abdomen to taper a dilated rectum in 2, mobilize a very high rectum in 2, and take down a distal colostomy stoma in 1. Eleven patients were referred with a variety of problems after a laparoscopic repair done elsewhere for rectal stricture (5), rectal prolapse (4), recurrent rectourethral fistula (3), rectal mislocation (3), failed attempted repair leading to fecal incontinence (1), and a posterior urethral diverticulum (1). Our literature review included 47 references (involving 323 patients) published between 1998 and 2010. All studies showed that laparoscopic repair of ARMs is feasible. The review, however, did not provide evidence of less invasiveness or improved functional results.

CONCLUSIONS

Laparoscopy for ARM is a less invasive procedure when compared with those operations that would have previously required a laparotomy (rectobladder neck fistula). In cases of rectoprostatic fistulae, the laparoscopic approach is feasible and avoids a lengthy posterior sagittal incision. There is no evidence that the laparoscopic approach is a less invasive procedure for other types of ARMs. In cases of rectobulbar fistula, congenital anal stenosis, perineal fistula, ARM without fistula, the evidence suggests that it may be lead to more complications. There is no evidence in the literature demonstrating better functional results in cases of ARM operated on laparoscopically.

Therapeutic strategy for persistent cloaca: the efficacy of antegrade continent enema as a salvage surgery

PURPOSE

The aim of this study is to evaluate our therapeutic strategy for persistent cloaca from the viewpoint of long-term functional outcome.

MATERIALS AND METHODS

This study covers 17 cases of persistent cloaca treated at our institution and followed for more than 3 years. As a definitive repair for anorectal and urogenital systems, simultaneous surgery with posterior sagittal approach or anorecto-urethrovagino-plasty (PSARUVP) was performed. The length of the common channel and the shape of the vagina determined the vaginoplasty methods. Fecal function was assessed with the scoring system of the Japan Study Group of Anorectal Anomalies.

RESULTS

Anorectoplasty was performed with the posterior sagittal approach in 15 cases and with the perineal approach in two. Vaginoplasty was performed with total urogenital mobilization in nine cases, rectal interposition in four, vaginal flap in two and with other methods. Fecal function was classified as good in three cases, moderate in ten, and poor in four. In the poor cases, Malone's antegrade continence enema (MACE) was performed, which improved fecal function significantly.

CONCLUSION

PSARUVP might be the optimal surgery for persistent cloaca at present; however, satisfactory fecal function could not be achieved in those cases with a longer common channel. MACE effectively compensated for the poor outcome and was especially successful at eliminating incontinence.

Laparoscopic-assisted anorectal pull-through for anorectal malformations: a systematic review and the need for standardization of outcome reporting

INTRODUCTION

Laparoscopic-assisted anorectal pull-through (LAARP) is becoming an increasingly common procedure to correct high and intermediate anorectal malformations (ARMs). The aim of this review was to evaluate worldwide experiences with LAARP with regard to indications, outcomes, and quality of reporting.

METHOD

A systematic review was conducted. The search was limited to studies reported in English and performed in humans. In addition to Medline and PubMed, a manual search of the Journal of Pediatric Surgery, Pediatric Surgery International, Surgical Endoscopy, and the Journal of Laparoendoscopic & Advanced Surgical Techniques published between June 2000 and April 2008 was conducted.

RESULTS

Seventeen studies were included in the final analysis. Of the included studies, none were randomized, 2 were prospective in nature, and 4 compared outcomes of posterior sagittal anorectoplasty and LAARP. The studies included 124 patients (96 males, 28 females) with 80% reported as having high/intermediate malformations. All studies reported short-term outcomes. Reported outcomes included continence, rectal prolapse, the position of the rectum (7 studies using Kelly score), manometry (1 study), contrast enema (1 study), postanal endosonography (3 studies), and postoperative magnetic resonance imaging (3 studies). Outcomes varied widely between reports precluding a meta-analysis.

CONCLUSION

The number of studies dealing with LAARP is low. There is a need for both a standardization and improvement in the quality of reporting in LAARP research. This will ultimately allow for evidence-based surgical decision making.

Delayed diagnosis of anorectal malformations: are current guidelines sufficient?

AIM

To determine the frequency and presenting features of infants with delayed diagnosis of anorectal malformations (ARM) referred to an Australian tertiary paediatric institution.

METHODS

Infants referred to our institution with a final diagnosis of ARM were retrospectively reviewed between 2001 and 2009. The first cohort consisted of patients that were referred between November 2001 and November 2006 with the diagnosis of an ARM that had been delayed for more than 48 h. The second cohort was those referred between December 2006 and May 2009 with whom the diagnosis of ARM had not been made within 24 h of birth.

RESULTS

Nineteen infants were referred with delayed diagnosis of an ARM over the 7.5 years of the study. Of 44 patients referred to our institution between December 2006 and May 2009, diagnosis of an ARM was delayed more than 24 h in 14 (32%). There was no difference in gender, birth weight, prematurity, type of malformation or presence of associated anomalies between those with timely and delayed diagnosis of their ARM. A significantly greater proportion of those with a delayed diagnosis presented with obstructive symptoms (86% vs. 27%, P < 0.001), including abdominal distension (57%) and delayed passage of meconium or stool (29%). Despite undergoing neonatal examination, the diagnosis of ARM was missed in 12 patients overall.

CONCLUSION

Delayed diagnosis of an ARM appears to be common, occurring in approximately 32% of patients referred to our institution over the last 2.5 years. Current guidelines appear insufficient to ensure prompt diagnosis of ARM.

Advances in pediatric colorectal surgical techniques

The operative management of pediatric colorectal diseases has improved significantly in recent years through the development of innovative approaches for operative exposure and a better understanding of colorectal anatomy. Advances in transanal and minimal access techniques have formed the cornerstone of this innovation, leading to improved functional outcomes, earlier recovery, and superior cosmetic results for a number of colorectal diseases. In this regard, we have witnessed a significant evolution in the way that many of these conditions are managed, particularly in the areas of anorectal malformations and Hirschsprung disease. Furthermore, a more thorough understanding of the pathophysiology underlying encopresis and true fecal continence has led to novel and less invasive approaches to the operative management of these conditions. The goal of this review is to describe the evolution of operative management pertaining to these diseases, with an emphasis on technical aspects and relevant clinical pitfalls.

Comparison of clinical outcomes and anorectal manometry in patients with congenital anorectal malformations treated with posterior sagittal anorectoplasty and laparoscopically assisted anorectal pull through

PURPOSE

The objective of this study is to analyze the clinical outcomes and anorectal manometry (AM) in infants with congenital high anorectal malformations treated with posterior sagittal anorectoplasty (PSARP) and laparoscopically assisted anorectal pull through (LAARP).

MATERIALS AND METHODS

From August 2005 to December 2008, 23 patients with congenital high anorectal malformations were randomly distributed into PSARP and LAARP groups. All of them underwent LAARP (11 cases) or PSARP (12 cases) at 2 or 3 months old. Clinical outcomes and results of anorectal manometry were compared between patients at the age of 17.4 +/- 4.9 and 19.3 +/- 6.2 months (P = .4270), respectively.

RESULTS

Kelly's clinical score for patients in LAARP and PSARP groups was 3.91 +/- 1.14 and 3.83 +/- 1.40 (P = .8827), respectively. Anal canal resting pressure and high-pressure zone length were 29.4 +/- 7.2 vs 23.4 +/- 6.5 mm Hg (P = .0479) and 14.9 +/- 3.0 vs 13.9 +/- 3.1 mm (P = .4414), respectively. Rectal anal inhibitory reflex was observed in 81.8% (9/11) and 83.3% (10/12) patients (P = 1.0000), respectively. The mean length of stay during the second hospitalization was 10.6 +/- 0.9 and 14.3 +/- 1.4 days (P < .0001), respectively.

CONCLUSIONS

Although no significant difference can be noted in clinical scoring between both groups, the results of anorectal manometry indicate that LAARP can significantly improve anal canal resting pressure and reduce the length of stay.

Rectovestibular fistula--rarely recognized associated gynecologic anomalies

INTRODUCTION

Vestibular fistulas are the most common anorectal malformations (ARMs) in females. Associated gynecologic defects are rarely mentioned in the literature but may have serious clinical implications if undetected. The definitive repair of the ARM offers an opportunity for diagnosis and treatment of these conditions.

METHODS

Two hundred seventy-two patients with vestibular fistula were retrospectively reviewed, with emphasis on gynecologic defects.

RESULTS

Forty-eight patients (17%) had 83 gynecologic anomalies. Fourteen patients had a vaginal septum, all with 2 uterine cervices. All septa were resected at the main repair. Twenty-six patients had no vaginal opening. Twenty of them had absent vagina. Eighteen of those had an absent uterus. Patients with absent vagina underwent vaginal replacement with distal rectum (12), sigmoid (6), and ileum (2). Six patients had a patent upper vagina; 3 reached the perineum after mobilization and 3 required replacement; 2 with sigmoid and 1 with rectum.

CONCLUSION

Vaginal septa are easily diagnosed and can be resected during the repair of the vestibular fistula. The presence of 2 cervices has important obstetric implications. Absent vagina requires a technically demanding repair, with special preoperative planning. Vaginoscopy or careful inspection should precede surgical reconstruction.

Anorectal malformations

Anorectal malformations comprise a wide spectrum of diseases, which can affect boys and girls, and involve the distal anus and rectum as well as the urinary and genital tracts. They occur in approximately 1 in 5000 live births. Defects range from the very minor and easily treated with an excellent functional prognosis, to those that are complex, difficult to manage, are often associated with other anomalies, and have a poor functional prognosis. The surgical approach to repairing these defects changed dramatically in 1980 with the introduction of the posterior sagittal approach, which allowed surgeons to view the anatomy of these defects clearly, to repair them under direct vision, and to learn about the complex anatomic arrangement of the junction of rectum and genitourinary tract. Better imaging techniques, and a better knowledge of the anatomy and physiology of the pelvic structures at birth have refined diagnosis and initial management, and the analysis of large series of patients allows better prediction of associated anomalies and functional prognosis. The main concerns for the surgeon in correcting these anomalies are bowel control, urinary control, and sexual function. With early diagnosis, management of associated anomalies and efficient meticulous surgical repair, patients have the best chance for a good functional outcome. Fecal and urinary incontinence can occur even with an excellent anatomic repair, due mainly to associated problems such as a poorly developed sacrum, deficient nerve supply, and spinal cord anomalies. For these patients, an effective bowel management program, including enema and dietary restrictions has been devised to improve their quality of life.