The pathophysiology of an enterocele and its management

Imaging modalities for the detection of posterior pelvic floor disorders in women with obstructed defaecation syndrome

BACKGROUND

Obstructed defaecation syndrome (ODS) is difficulty in evacuating stools, requiring straining efforts at defaecation, having the sensation of incomplete evacuation, or the need to manually assist defaecation. This is due to a physical blockage of the faecal stream during defaecation attempts, caused by rectocele, enterocele, intussusception, anismus or pelvic floor descent. Evacuation proctography (EP) is the most common imaging technique for diagnosis of posterior pelvic floor disorders. It has been regarded as the reference standard because of extensive experience, although it has been proven not to have perfect accuracy. Moreover, EP is invasive, embarrassing and uses ionising radiation. Alternative imaging techniques addressing these issues have been developed and assessed for their accuracy. Because of varying results, leading to a lack of consensus, a systematic review and meta-analysis of the literature are required.

OBJECTIVES

To determine the diagnostic test accuracy of EP, dynamic magnetic resonance imaging (MRI) and pelvic floor ultrasound for the detection of posterior pelvic floor disorders in women with ODS, using latent class analysis in the absence of a reference standard, and to assess whether MRI or ultrasound could replace EP. The secondary objective was to investigate differences in diagnostic test accuracy in relation to the use of rectal contrast, evacuation phase, patient position and cut-off values, which could influence test outcome.

SEARCH METHODS

We ran an electronic search on 18 December 2019 in the Cochrane Library, MEDLINE, Embase, SCI, CINAHL and CPCI. Reference list, Google scholar. We also searched WHO ICTRP and clinicaltrials.gov for eligible articles. Two review authors conducted title and abstract screening and full-text assessment, resolving disagreements with a third review author.

SELECTION CRITERIA

Diagnostic test accuracy and cohort studies were eligible for inclusion if they evaluated the test accuracy of EP, and MRI or pelvic floor ultrasound, or both, for the detection of posterior pelvic floor disorders in women with ODS. We excluded case-control studies. If studies partially met the inclusion criteria, we contacted the authors for additional information.

DATA COLLECTION AND ANALYSIS

Two review authors performed data extraction, including study characteristics, 'Risk-of-bias' assessment, sources of heterogeneity and test accuracy results. We excluded studies if test accuracy data could not be retrieved despite all efforts. We performed meta-analysis using Bayesian hierarchical latent class analysis. For the index test to qualify as a replacement test for EP, both sensitivity and specificity should be similar or higher than the historic reference standard (EP), and for a triage test either specificity or sensitivity should be similar or higher. We conducted heterogeneity analysis assessing the effect of different test conditions on test accuracy. We ran sensitivity analyses by excluding studies with high risk of bias, with concerns about applicability, or those published before 2010. We assessed the overall quality of evidence (QoE) according to GRADE.

MAIN RESULTS

Thirty-nine studies covering 2483 participants were included into the meta-analyses. We produced pooled estimates of sensitivity and specificity for all index tests for each target condition. Findings of the sensitivity analyses were consistent with the main analysis. Sensitivity of EP for diagnosis of rectocele was 98% (credible interval (CrI)94%-99%), enterocele 91%(CrI 83%-97%), intussusception 89%(CrI 79%-96%) and pelvic floor descent 98%(CrI 93%-100%); specificity for enterocele was 96%(CrI 93%-99%), intussusception 92%(CrI 86%-97%) and anismus 97%(CrI 94%-99%), all with high QoE. Moderate to low QoE showed a sensitivity for anismus of 80%(CrI 63%-94%), and specificity for rectocele of 78%(CrI 63%-90%) and pelvic floor descent 83%(CrI 59%-96%). Specificity of MRI for diagnosis of rectocele was 90% (CrI 79%-97%), enterocele 99% (CrI 96%-100%) and intussusception 97% (CrI 88%-100%), meeting the criteria for a triage test with high QoE. MRI did not meet the criteria to replace EP. Heterogeneity analysis showed that sensitivity of MRI performed with evacuation phase was higher than without for rectocele (94%, CrI 87%-98%) versus 65%, CrI 52% to 89%, and enterocele (87%, CrI 74%-95% versus 62%, CrI 51%-88%), and sensitivity of MRI without evacuation phase was significantly lower than EP. Specificity of transperineal ultrasound (TPUS) for diagnosis of rectocele was 89% (CrI 81%-96%), enterocele 98% (CrI 95%-100%) and intussusception 96% (CrI 91%-99%); sensitivity for anismus was 92% (CrI 72%-98%), meeting the criteria for a triage test with high QoE. TPUS did not meet the criteria to replace EP. Heterogeneity analysis showed that sensitivity of TPUS performed with rectal contrast was not significantly higher than without for rectocele(92%, CrI 69%-99% versus 81%, CrI 58%-95%), enterocele (90%, CrI 71%-99% versus 67%, CrI 51%-90%) and intussusception (90%, CrI 69%-98% versus 61%, CrI 51%-86%), and was lower than EP. Specificity of endovaginal ultrasound (EVUS) for diagnosis of rectocele was 76% (CrI 54%-93%), enterocele 97% (CrI 80%-99%) and intussusception 93% (CrI 72%-99%); sensitivity for anismus was 84% (CrI 59%-96%), meeting the criteria for a triage test with very low to moderate QoE. EVUS did not meet the criteria to replace EP. Specificity of dynamic anal endosonography (DAE) for diagnosis of rectocele was 88% (CrI 62%-99%), enterocele 97% (CrI 75%-100%) and intussusception 93% (CrI 65%-99%), meeting the criteria for a triage test with very low to moderate QoE. DAE did not meet the criteria to replace EP. Echodefaecography (EDF) had a sensitivity of 89% (CrI 65%-98%) and specificity of 92% (CrI 72%-99%) for intussusception, meeting the criteria to replace EP but with very low QoE. Specificity of EDF for diagnosis of rectocele was 89% (CrI 60%-99%) and for enterocele 97% (CrI 87%-100%); sensitivity for anismus was 87% (CrI 72%-96%), meeting the criteria for a triage test with low to very low QoE.

AUTHORS' CONCLUSIONS

In a population of women with symptoms of ODS, none of the imaging techniques met the criteria to replace EP. MRI and TPUS met the criteria of a triage test, as a positive test confirms diagnosis of rectocele, enterocele and intussusception, and a negative test rules out diagnosis of anismus. An evacuation phase increased sensitivity of MRI. Rectal contrast did not increase sensitivity of TPUS. QoE of EVUS, DAE and EDF was too low to draw conclusions. More well-designed studies are required to define their role in the diagnostic pathway of ODS.

Enterocele manifesting as recurrent anterior rectal prolapse: A case report

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There should be a low threshold to complete dynamic imaging for anorectal pathology.

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Defecography is particularly useful to identify enteroceles presenting as prolapse.

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Surgical approaches to rare pelvic floor defects must be individualized.

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Consult Urogynecology or Colorectal surgery for management of pelvic floor defects.

Introduction and importance

An enterocele is a true herniation of small bowel through the rectovaginal septum, most commonly occurring transvaginally. Although the prevalence of enterocele is not as low as previously thought, enteroceles manifesting transrectally or with rectal prolapse are exceedingly rare and without established surgical guidance.

Case presentation

A medically complex, oxygen-dependent patient presented with full fecal incontinence and transrectal enterocele associated with recurrent anterior rectal prolapse. This was diagnosed via defecography and repaired under regional anesthesia through an open transabdominal approach of posterior cul-de-sac obliteration, uterosacral ligament vaginal vault suspension and simplified ventral suture rectopexy. Surgical planning was determined through a multidisciplinary care-conference, with preference for an approach with minimal respiratory compromise and repair durability. Short-term, this patient has complete resolution of bulge symptoms, and improved fecal continence.

Clinical discussion

In addition to history and examination, dynamic imaging of the pelvic floor, specifically defecography, is particularly useful in identifying enteroceles that present as a component of pelvic organ or anorectal prolapse. As there are no established standard surgical treatment approaches for these rare conditions, surgeons must consider several points prior to proceeding: the repair of the defect, the symptoms the repair targets, and repair durability.

Conclusions

Complete assessment and specialist consultation should be pursued prior to surgical repair for anorectal pathology. For this patient, an open transabdominal native tissue repair under regional anesthesia was successful, emphasizing that approaches to surgical correction of such rare presentations must be individualized.

Transvaginal peritoneocele repair with anterior levatorplasty for patients with a rectocele and an enterocele

Enteroceles and rectoceles are often identified as the cause of a vaginal mass and pelvic discomfort. The combination of a rectocele and an enterocele as pelvic organ prolapses is not infrequent; however, there are few reports on possible simultaneous treatments of these two conditions. We report a new and simple procedure for repairing an enterocele during a transvaginal anterior levatorplasty with posterior colporrhaphy for a rectocele repair. This technique involves making an excision in the peritoneal sac, with high ligation, and attaching the uterine cervix and/or cardinal ligament to the upper most part of the approximation of the levator muscles, to reinforce and lift the deep peritoneal sac. This procedure allows for transvaginal repair of both an enterocele and a rectocele. The enterocele is visualized by applying barium to the posterior vaginal wall during defecography.

Extraperineal enterocele in male: A case report and literature review

INTRODUCTION

Enterocele is a herniation of the small bowel through the cul-de-sac. It is uncommon and most often seen in elder females. Large enterocele manifesting as rectal prolapse is exceedingly rare and only few cases are reported previously. Due to it rarity, the best surgical treatment is not yet established especially in male patients. We present a case of enterocele causing rectal prolapse in a male patient that was treated surgically.

PRESENTATION OF CASE

A 47-year-old African American male with chronic constipation and straining presented with manually reducible rectal prolapse. A defecography revealed a large enterocele prolapsing through the anterior rectal wall. The patient underwent an open posterior suture rectopexy with peritoneoplasty. His symptoms completely resolved after surgery, and repeat defecography three months after the procedure showed no sign of recurrence.

DISCUSSION & CONCLUSION

Extraperineal enterocele in male is a rare disease. Rectopexy with peritoneoplasty can provide a great symptom relieve and improvement on defecography. Long-term outcome should be evaluated.

The TRAM dam design: a new method for treatment of an enterocele

A new method for the treatment of an enterocele is described and illustrated with a case report. In a patient with Ehlers Danlos syndrome, a pedicled muscle sparing transverse rectus abdominis myocutaneous flap was used to fill the pelvic inlet and rectovaginal space. The flap prevents descend of bowel into the pelvic inlet and rectovaginal space. The patient's defecation problems and pelvic discomfort were resolved. The technique does not require the use of a synthetic mesh and causes little donor site morbidity.

Enterocele repair by abdominal obliteration of the pelvic inlet: long-term outcome on obstructed defaecation and symptoms of pelvic discomfort

OBJECTIVE

Enterocele is defined as a herniation of the peritoneal sac between the vagina and the rectum. This may contain either sigmoid colon or small bowel. It has been reported that enterocele is associated with obstructed defaecation and symptoms of pelvic discomfort. The aim of the present study was to evaluate the long-term effect of enterocele repair.

METHOD

In the time period between 1994 and 2003, 54 women (median age 54 years; range: 31-80) with a symptomatic enterocele underwent obliteration of the pelvic inlet with a U-shaped Mersilene mesh. All patients underwent evacuation proctography (EP), which was repeated 6 months after the repair. In addition, they were contacted over the telephone to assess the long-term effect of enterocele repair. Forty-nine patients were willing to answer questions over the telephone. Five patients were lost to follow-up (response rate: 91%).

RESULTS

Six months after the procedure, EP revealed a recurrent or persistent enterocele in five (9%) patients, which was symptomatic in two, both of whom underwent a second repair. Among the 49 patients without an enterocele after 6 months, 10 (23%) women encountered recurrent symptoms of pelvic discomfort at a median follow-up of 85 months (range: 3-137). Despite adequate correction of the enterocele, obstructed defaecation persisted in 21 (75%) patients of 28, who presented with this problem before the procedure. De novo dyspareunia occurred in 5% of the women after the procedure.

CONCLUSION

Obliteration of the pelvic inlet with a U-shaped Mersilene mesh provides an effective tool for anatomical correction of enteroceles. However, in the long term one of four patients encounters recurrent symptoms of pelvic discomfort. It seems unlikely that enterocele contributes to obstructed defaecation, as evacuation difficulties persist in around three quarters of the patients.

Posterior intra-vaginal slingplasty for the treatment of vaginal apex prolapse: Medium-term results of 140 operations with a novel procedure

OBJECTIVES

Urogynecologists are constantly looking for simple, safe and effective ways to cure vaginal apex prolapse. A novel surgical technique, posterior intra-vaginal slingplasty (PIVS), was reported recently to include both a high therapeutic rate and a low complication rate. The present study was aimed at evaluating the preliminary data of a series of PIVS-treated patients.

STUDY DESIGN

A total of 140 patients with vaginal apex prolapse underwent the PIVS operation in a daycare setting. Pre-operative demographics, operative details and post-operative follow-up data were prospectively collected for all patients.

RESULTS

The PIVS procedure dose requires neither laparotomy nor deep transvaginal dissection as previously required for operative intervention. No intra-operative complications were recorded. The hospitalization period was relatively short. Three patients (2.1%) presented with surgical failure, whereas 137 (97.8%) of the operated patients reported satisfaction with the therapeutic results. One patient had post-operative unilateral gluteal skin infection. She was treated by surgical removal of the infected hemi-tape. Twelve (8.6%) patients had vaginal tape protrusion, of which 11 underwent segmental tape resection at the outpatient clinic. Two patients had spontaneous rejection of the tape while the vaginal apex remained well suspended. One patient suffered from post-operative fever of unknown origin, which was effectively treated with oral antibiotics.

CONCLUSIONS

The novel PIVS operation reduces the complication rate and shortens the rehabilitation period previously reported for the types of operation designed in the past to cure vaginal apex prolapse. The current list of results supports the previously reported efficacy, safety and simplicity of this procedure. However, more long-term data are required to be able to draw solid conclusions concerning the superiority of the discussed operative technique.

Conservation of the prolapsed uterus is a valid option: medium term results of a prospective comparative study with the posterior intravaginal slingoplasty operation

It has been reported that, by the age of 80, the risk of women to undergo surgery for the treatment of pelvic organ prolapse (POP) exceeds 10%, a percentage expected to increase with the rise in life expectancy. The vaginal approach for POP reconstructive operations is associated with fewer complications and results in a shorter rehabilitation period than the abdominal route, whereas hysterectomy is widely performed concomitantly whenever the uterus is significantly prolapsed. However, there is no clear evidence supporting the role of hysterectomy in improving surgery outcome. We present our experience with a new minimally invasive procedure--the posterior intravaginal slingplasty (PIVS) for correction of advanced uterine prolapse--at the same time, comparing additive vaginal hysterectomy to uterine preservation, to evaluate the therapeutic significance of hysterectomy when vaginal apical prolapse is reconstructed with PIVS. Seventy-nine women presenting with moderate to severe uterine prolapse were enrolled into the current PIVS study. Vaginal hysterectomy was concomitantly performed upon patient's request (44 patients), whereas those wishing to preserve their uterus underwent reconstructive surgery only (35 patients). No intraoperative or postoperative major complications were recorded during an average follow-up of 29.8 months: One patient (1.3%) presented with surgical failure, whereas 71 (89.9%) of the operated patients reported satisfaction with the therapeutic results. Bladder overactivity symptoms declined from three thirds of the patients preoperatively to below 10% postoperatively. Ten (12.7%) patients had vaginal tape protrusion; all underwent segmental tape resection at the out-patient clinic. Because the PIVS procedure does not require either laparotomy or deep transvaginal dissection, as previously required for operative intervention, the hospitalization period was relatively short: 4.2 days for the hysterectomy group and 1.5 for the non-hysterectomy group. Other statistically significant differences between the hysterectomy and non-hysterectomy groups were the average ages (63.5 vs 51.0 years, respectively) and concomitant surgery (87% vs 69%, respectively, the higher percentage due to additive amputation of elongated uterine cervices). No other significant differences were recorded. The current results support the previously reported efficacy, safety, and simplicity of the PIVS procedure as well as the legitimacy of uterine preservation. Moreover, unstable bladder symptoms were found to be improved after this operation. However, long-term data are required to be able to draw solid conclusions concerning the superiority of the discussed operation.

[Surgical treatment of rectocele and enterocele: an integrated view of disorders of the posterior vaginal compartment]

Genital prolapse, whether associated or not with urinary, anal or sexual dysfunction, should be evaluated globally to select the appropriate treatment. Rectocele and enterocele are defects of the posterior vaginal compartment, although they can be secondary to abnormalities of the central compartment, since lesions of the perineal raphe and rectovaginal septum can occur in isolation or accompanied by others that also affect the tissues involved in pelvic support. The various surgical approaches to rectocele alone or associated with other defects are reviewed. Likewise, the distinct pathogenic types of enterocele are discussed. Laparoscopic sacrocolpoperineopexy is a promising intervention for the simultaneous correction of defects of the posterior and central compartments. New and better designed studies are required to evaluate the distinct surgical approaches and interventions for genital prolapse.

La perineoplastia protésica del tabique rectovaginal, vía transvaginal, en el tratamiento del rectocele y enterocele. Resultados de 77 casos

OBJECTIVE

Anatomical and functional outcomes after transvaginal perineoplasty of the vaginal septum using polypropylene mesh in 77 patients with rectocele, enterocele, or both were studied. The frequency of other associated pelvic floor defects was also analyzed.

PATIENTS AND METHOD

Between 1997 and May 2005, 77 patients underwent surgery (30 for enterocele, 33 for rectocele and 14 for both defects). In all patients, complete dissection of the rectovaginal space, resection of the redundant vaginal wall tissue, suturing of the polypropylene mesh to the lateral bundles of the puborectal muscle, and posterior colporrhaphy were performed. In enteroceles, Douglas' pouch was resected before the mesh was placed.

RESULTS

During follow-up, there were 3 minimal vaginal dehiscences requiring partial extirpation of the mesh in 2 (12.1%), and 1 (1.2%) rectocele recurrence. No subsequent mesh extrusions or recurrences were detected during follow-up. The frequency of associated pelvic floor disorders was 92%.

CONCLUSIONS

In our experience, placement of polypropylene mesh in the rectovaginal septum with lateral suturing to puborectal muscle bundles provides excellent results compared with other approaches and meshes that are not sutured and fixed in the rectovaginal space, leading to mesh infection, extrusion or complete removal.

Associated pelvic organ prolapse in women with stress urinary incontinence: when to operate?

PURPOSE OF REVIEW

This review discusses recently published data concerning the indications for pelvic organ prolapse (POP) surgery in women who present with stress urinary incontinence (SUI).

RECENT FINDINGS

POP can functionally mask SUI. Surgery for POP may unmask occult SUI in many women. Clinically continent women undergoing POP surgery are at risk for developing symptomatic SUI postoperatively. Preoperative identification of occult (and overt) SUI will facilitate the use of an appropriate prophylactic anti-incontinence procedure at the time of prolapse repair. Numerous studies on the preoperative prediction of SUI following repair of POP have been conducted in an effort to determine whether concomitant prophylactic measures should be taken at the time of POP repair to prevent the postoperative unmasking of SUI in women who do not have SUI preoperatively (with or without prolapse reduction). Although the literary evidence available is not sufficient for POP with occult SUI, there is some information available to guide clinicians in deciding when to perform concurrent POP surgery in women who are undergoing primary surgery for SUI.

SUMMARY

The intended goal of surgical correction of SUI and POP is durable restoration of normal anatomy and function, with symptomatic relief and avoidance of morbidity. Recommendations regarding when to surgically intervene for POP in women who present with SUI are based on the available literature although contemporary studies are few and include small numbers of patients with no controls. Long-term, randomized, controlled prospective studies of large numbers of patients are indicated.