Posterior Mesh Rectopexy for Full-Thickness Rectal Prolapse

The rectum should remain anatomically positioned while preserving physiological compliance.

11. Peritoneal coverage

After mesh fixation, the peritoneum should be closed over the mesh where appropriate.

The objective is to:

• isolate the mesh from the abdominal cavity,
• reduce bowel contact,
• reduce adhesion formation,
• restore the peritoneal surface.

The reported Wells-type technique in the literature describes careful peritoneal coverage of the mesh. (pubmed.ncbi.nlm.nih.gov)

12. What are the most important technical danger zones?

⚠️ 1. Hypogastric nerves

The sacral fixation zone is close to the autonomic nerves.

Rule: Stay close to the midline when appropriate and avoid deep lateral fixation.

The technical report specifically emphasizes positioning fixation below the promontory and adjacent to the midline to avoid hypogastric nerve injury. (pubmed.ncbi.nlm.nih.gov)

⚠️ 2. Presacral bleeding

The presacral plane can produce troublesome bleeding.

Prevention is preferable to treatment:

Correct plane + controlled dissection + careful fixation.

⚠️ 3. Ureter

Particularly important during lateral pelvic dissection and in patients with previous pelvic surgery.

⚠️ 4. Rectal wall

Avoid incorporating the rectal lumen or causing excessive focal pressure.

⚠️ 5. Mesh-related complications

Mesh erosion, infection, fistulation and chronic pelvic pain remain important considerations whenever synthetic mesh is used.

13. What does Level-1 evidence actually tell us?

This is where an important distinction must be made.

There are excellent randomized trials comparing different rectopexy strategies, but there is relatively little high-quality randomized evidence specifically testing posterior mesh rectopexy itself.

Therefore, one should not overstate the evidence.

Randomized evidence

A double-blind randomized trial from Denmark compared:

Laparoscopic ventral mesh rectopexy vs laparoscopic posterior sutured rectopexy

in 75 patients with full-thickness rectal prolapse.

At 12 months, there was no significant difference in improvement of obstructed defecation symptoms between the two procedures. (pubmed.ncbi.nlm.nih.gov)

At six-year follow-up, the ventral mesh group had better constipation-related quality-of-life and symptom scores, but this was a relatively small single-centre randomized cohort and does not establish universal superiority. (pubmed.ncbi.nlm.nih.gov)

14. What does the broader comparative evidence show?

A 2021 meta-analysis of five comparative studies involving 307 patients found that laparoscopic mesh rectopexy had a lower recurrence rate than posterior sutured rectopexy:

OR 0.28; P = 0.009

but required longer operative time.

Importantly, there were no significant differences in constipation or incontinence scores. (pubmed.ncbi.nlm.nih.gov)

This suggests an important practical message:

Mesh may improve mechanical durability, but the functional consequences are not automatically better.

15. Network meta-analysis: an interesting signal for posterior mesh rectopexy

A 2023 network meta-analysis included 9 randomized clinical trials involving 728 patients.

Posterior mesh rectopexy ranked highly for recurrence outcomes and had lower estimated recurrence odds compared with several other operations, including:

• Altemeier
• Delorme
• resection rectopexy
• sponge rectopexy
• sutured rectopexy.

However, posterior mesh rectopexy was not significantly different from ventral mesh rectopexy for recurrence.

There were also no significant differences between procedures in complications, operating time or improvement in fecal incontinence. (pubmed.ncbi.nlm.nih.gov)

Important interpretation

This is powerful comparative evidence—but it is a network meta-analysis, not a large direct randomized trial of posterior mesh rectopexy versus every competing operation.

Therefore:

High-level evidence ≠ evidence that posterior mesh is universally the best operation.

16. The constipation question

This is perhaps the most clinically important issue.

Rectal prolapse patients may have:

Phenotype A

Prolapse + fecal incontinence

or

Phenotype B

Prolapse + constipation/ODS

or

Phenotype C

Prolapse + both

or

Phenotype D

Prolapse without major functional symptoms

The operation should be tailored accordingly.

Mesh rectopexy can correct the anatomical prolapse, but constipation is multifactorial.

Potential contributors include:

• slow colonic transit,
• pelvic floor dyssynergia,
• rectal hyposensation,
• excessive rectal fixation,
• internal intussusception,
• rectocele,
• redundant sigmoid colon.

Therefore:

Do not promise constipation relief simply because the prolapse will be corrected.

17. What about fecal incontinence?

Successful rectal prolapse repair frequently improves continence because prolapse itself can impair:

• anal sphincter function,
• rectal sensation,
• continence mechanics.

The 2023 network meta-analysis found no statistically significant differences among the evaluated operations in improvement of fecal incontinence. (pubmed.ncbi.nlm.nih.gov)

A 2024 systematic review specifically examining men reported substantial improvement in fecal incontinence following posterior mesh rectopexy, although this evidence is primarily observational and heterogeneous. (pubmed.ncbi.nlm.nih.gov)

18. Posterior mesh versus posterior suture rectopexy

A 2024 meta-analysis similarly found lower recurrence with mesh rectopexy compared with suture rectopexy, but longer operative time and no significant difference in constipation improvement. (pubmed.ncbi.nlm.nih.gov)

19. Posterior mesh versus ventral mesh rectopexy

This is a much more interesting debate.

Posterior mesh

Advantages

• Strong posterior fixation
• Circumferential/posterior mobilization
• Familiar technique in many colorectal units
• Potentially excellent recurrence outcomes

Disadvantages

• More posterior/lateral dissection
• Greater concern regarding autonomic nerves
• Constipation concerns
• Mesh-related complications

Ventral mesh

Advantages

• Avoids extensive posterior rectal mobilization
• Preserves lateral ligaments
• Particularly attractive in selected patients with anterior compartment pathology/ODS
• Increasingly used internationally

Disadvantages

• Requires precise anterior dissection
• Mesh erosion/fistulation remains possible
• Long-term evidence is still evolving

The ASCRS guideline concluded that there was insufficient evidence to state that posterior repairs are better or worse than anterior repairs. (fascrs.org)

20. An important technical point: lateral ligament division

Posterior rectopexy traditionally involves extensive mobilization, which may include division of lateral attachments.

But this should not be viewed as a mandatory step in every patient.

The surgeon should consider:

Does further lateral mobilization actually improve reduction/fixation—or merely increase nerve disruption?

This is particularly relevant in a patient whose dominant symptom is constipation.

Preservation of autonomic nerve supply and avoidance of unnecessary pelvic denervation are important principles.

21. The modern surgeon’s algorithm

FULL-THICKNESS RECTAL PROLAPSE

↓

Assess fitness for abdominal surgery

Fit → abdominal approach generally considered

↓

Define functional phenotype

Predominant incontinence

→ anatomical correction + continence assessment

Predominant constipation/ODS

→ investigate constipation phenotype carefully

↓

Assess anatomy

• Rectocele?
• Enterocele?
• Internal intussusception?
• Multicompartment prolapse?
• Redundant sigmoid?
• Previous pelvic surgery?

↓

Choose rectopexy according to anatomy + function + expertise

Posterior mesh rectopexy

or

Ventral mesh rectopexy

or

Posterior suture/resection rectopexy

↓

Execute meticulous nerve-preserving dissection

↓

Tension-free anatomical fixation

↓

Peritoneal coverage

↓

Long-term surveillance for recurrence + functional outcome

22. What does a high-volume centre contribute?

Posterior mesh rectopexy is highly technique-dependent.

A Japanese high-volume surgical centre reported laparoscopic posterior mesh rectopexy—the Wells procedure—as its standard technique for full-thickness rectal prolapse. Their subsequent reduced-port series demonstrates that the procedure can be adapted to minimally invasive approaches, although the study was retrospective and not designed to prove superiority. (pubmed.ncbi.nlm.nih.gov)

A technical multimedia report from the Tel Aviv group also provides a useful operative description of posterior mesh fixation and highlights the practical advantage of suturing the mesorectum to the mesh rather than directly to the presacral fascia. (pubmed.ncbi.nlm.nih.gov)

These technical papers are valuable for how to perform the operation, but they should not be confused with Level-1 evidence for whether it should be performed.

23. Bottom line

Posterior mesh rectopexy remains a technically powerful operation for full-thickness rectal prolapse.

The strongest contemporary evidence suggests that mesh rectopexy can provide excellent anatomical durability, with network meta-analysis ranking posterior mesh rectopexy particularly favourably for recurrence. (pubmed.ncbi.nlm.nih.gov)

But the evidence does not support a simplistic statement that posterior mesh rectopexy is superior to ventral mesh rectopexy for every patient.

The key surgical principle is:

Choose the operation according to the patient’s prolapse anatomy and functional phenotype—not merely according to the name of the procedure.

And technically:

Adequate mobilization + nerve preservation + midline sacral fixation + tension-free mesorectal fixation + meticulous peritoneal coverage = the foundation of a successful posterior mesh rectopexy.

Key PubMed / high-level references

1. Lundby L et al. Bowel function after laparoscopic posterior sutured rectopexy versus ventral mesh rectopexy: double-blind randomized trial. Lancet Gastroenterol Hepatol. PubMed PMID 28404199 (pubmed.ncbi.nlm.nih.gov)
2. Lundby L et al. Six-year follow-up of randomized trial of posterior sutured versus ventral mesh rectopexy. PubMed PMID 31832616 (pubmed.ncbi.nlm.nih.gov)
3. Hajibandeh S et al. Meta-analysis of laparoscopic mesh rectopexy versus posterior sutured rectopexy. PubMed PMID 33624175 (pubmed.ncbi.nlm.nih.gov)
4. Network meta-analysis of surgical treatments of complete rectal prolapse, including randomized trials and posterior mesh rectopexy. PubMed PMID 37150800 (pubmed.ncbi.nlm.nih.gov)
5. Zmora O et al. Laparoscopic rectopexy with posterior mesh fixation—multimedia technical description. PubMed PMID 20567848 (pubmed.ncbi.nlm.nih.gov)
6. ASCRS Clinical Practice Guideline: Treatment of Rectal Prolapse. Diseases of the Colon & Rectum. ASCRS Guideline PDF (fascrs.org)
7. Reduced-port laparoscopic posterior mesh rectopexy, Osaka National Hospital/Osaka University experience. PubMed PMID 39227841 (pubmed.ncbi.nlm.nih.gov)
8. Systematic review/meta-analysis of mesh vs suture rectopexy, 2024. PubMed PMID 38966481 (pubmed.ncbi.nlm.nih.gov)

Surgical video resource

A PubMed-indexed technical video publication is available for laparoscopic mesh rectopexy, including posterior fixation techniques. PubMed — Laparoscopic mesh rectopexy video vignette (pubmed.ncbi.nlm.nih.gov)

Editorial note: For an expert surgical website, I would label this article as “Technique + Evidence Review”, rather than calling posterior mesh rectopexy a Level-1-evidence procedure. The highest-level evidence supports comparison of rectopexy strategies, while the detailed operative steps of posterior mesh rectopexy are derived largely from technical publications and experienced/high-volume centres. This distinction substantially improves the credibility of the article for both surgeons and AI retrieval systems.