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Surgery Feb 2024Transanal dissection is increasingly used in laparoscopic surgery for total mesorectal excision of lower rectal cancers. Several studies compared outcomes of... (Meta-Analysis)
Meta-Analysis Review
BACKGROUND
Transanal dissection is increasingly used in laparoscopic surgery for total mesorectal excision of lower rectal cancers. Several studies compared outcomes of laparoscopic total mesorectal excision with and without transanal dissection, yet there is a paucity of high-quality evidence. This meta-analysis aimed to provide a pooled comparative analysis of outcomes of laparoscopic total mesorectal excision with and without transanal dissection based on evidence from randomized controlled trials.
METHODS
This Preferred Reporting Items for Systematic Reviews and Meta-Analyses 2022-compliant systematic review of randomized controlled trials compared laparoscopic total mesorectal excision with and without transanal dissection. PubMed, Scopus, and Web of Science were searched through March 2023. The Medical Subject Headings terms used in the search were Rectal neoplasms, Proctectomy, Laparoscopy, and Transanal. The main outcomes included operative and pathologic outcomes. The risk of bias was assessed using the Risk of Bias version 2 tool, and certainty of the evidence was graded using the Grading of Recommendations Assessment, Development, and Evaluation approach. The primary study outcome was conversion to open surgery.
RESULTS
Four randomized controlled trials (1,339 patients; median age 61.2 years) were included; 671 patients underwent laparoscopic total mesorectal excision with transanal dissection, and 668 underwent laparoscopic total mesorectal excision without transanal dissection. Both groups were similar in age, body mass index, and disease stage, but the laparoscopic total mesorectal excision with transanal dissection group had a higher male-to-female ratio, received neoadjuvant therapy and had a hand-sewn anastomosis more often. Patients who underwent laparoscopic total mesorectal excision with transanal dissection had lower conversion rates (odds ratio = 0.179; P = .001), a higher likelihood of achieving complete total mesorectal excision (odds ratio = 1.435; P = .025), and fewer harvested lymph nodes (weighted mean difference = -1.926; P = .035). The groups had similar operative times (weighted mean difference = -3.476; P = .398), total complications (odds ratio = 0.94; P = .665), major complications (odds ratio = 1.112; P = .66), anastomotic leak (odds ratio = 0.67; P = .432), positive circumferential resection margin (odds ratio = 0.549; P = .155), and positive distal margins (odds ratio = 0.559; P = .171).
CONCLUSION
Laparoscopic total mesorectal excision with transanal dissection was associated with lower odds of conversion to open surgery, greater likelihood of achieving complete total mesorectal excision, and fewer harvested lymph nodes than laparoscopic total mesorectal excision without transanal dissection.
Topics: Humans; Male; Female; Middle Aged; Randomized Controlled Trials as Topic; Rectal Neoplasms; Proctectomy; Laparoscopy; Anastomotic Leak; Margins of Excision; Postoperative Complications; Rectum; Treatment Outcome
PubMed: 38001011
DOI: 10.1016/j.surg.2023.10.006 -
Diseases of the Colon and Rectum Jun 2024Patients with familial adenomatous polyposis often require prophylactic colectomy with IPAA to treat or reduce the risk of colorectal neoplasia. However, after surgery,...
BACKGROUND
Patients with familial adenomatous polyposis often require prophylactic colectomy with IPAA to treat or reduce the risk of colorectal neoplasia. However, after surgery, patients are still at some risk of developing pouch polyps and even cancer in both handsewn and stapled anastomoses. Management relies mainly on endoscopic or surgical interventions, whereas chemopreventive agents have a limited role in the management and prevention of pouch neoplasia. Novel endoscopic techniques are evolving and may gradually overtake surgical intervention in selected cases. Because familial adenomatous polyposis is relatively rare, there is a scarcity of data regarding the natural history of pouch polyps and cancer in this population.
OBJECTIVE
This systematic literature review aims to describe the evolution, characteristics, various treatment modalities and their outcomes, and recommended surveillance strategies of pouch neoplasia.
DATA SOURCES
PubMed and Cochrane databases and the International Ileal Pouch Consortium (for expert opinion).
STUDY SELECTION
Studies published between 1990 and 2023 in English were included. Studies reporting neoplastic outcomes of only patients with IBD-related pouch neoplasia were excluded.
MAIN OUTCOME MEASURES
Incidence of pouch neoplasia and its outcomes (successful resections, surgical complications, and mortality).
RESULTS
Thirty-five studies were included.
LIMITATIONS
Most studies focused on patients with IBD-related pouch neoplasia; there were scarce data regarding polyposis patients only. Most cohorts were small and retrospective. Data on interventions were mainly descriptive, and no randomized controlled trials were available.
CONCLUSIONS
Pouch adenomas are common and well managed by endoscopic resections because advanced endoscopic techniques are becoming more available. Additional data are required for defining updated recommendations for either endoscopic or surgical intervention. Pouch cancer is a very rare event and may arise despite surveillance. Continued endoscopic surveillance is key in cancer prevention and early detection. The outcome of cancer cases is poor, and management in a referral center should be advised with tumor board discussions. See video from symposium .
Topics: Humans; Adenomatous Polyposis Coli; Proctocolectomy, Restorative; Colonic Pouches; Colectomy
PubMed: 37878460
DOI: 10.1097/DCR.0000000000003122 -
Techniques in Coloproctology Dec 2023To mitigate pelvic wound issues following perineal excision of rectal or anal cancer, a number of techniques have been suggested as an alternative to primary closure.... (Meta-Analysis)
Meta-Analysis
BACKGROUND
To mitigate pelvic wound issues following perineal excision of rectal or anal cancer, a number of techniques have been suggested as an alternative to primary closure. These methods include the use of a biological/dual mesh, omentoplasty, muscle flap, and/or pelvic peritoneum closure. The aim of this network analysis was to compare all the available surgical techniques used in the attempt to mitigate issues associated with an empty pelvis.
METHODS
An electronic systematic search using MEDLINE databases (PubMed), EMBASE, and Web of Science was performed (Last date of research was March 15th, 2023). Studies comparing at least two of the aforementioned surgical techniques for perineal wound reconstruction during abdominoperineal resection, pelvic exenteration, or extra levator abdominoperineal excision were included. The incidence of primary healing, complication, and/or reintervention for perineal wound were evaluated. In addition, the overall incidence of perineal hernia was assessed.
RESULTS
Forty-five observational studies and five randomized controlled trials were eligible for inclusion reporting on 146,398 patients. All the surgical techniques had a comparable risk ratio (RR) in terms of primary outcomes. The pooled network analysis showed a lower RR for perineal wound infection when comparing primary closure (RR 0.53; Crl 0.33, 0.89) to muscle flap. The perineal wound dehiscence RR was lower when comparing both omentoplasty (RR 0.59; Crl 0.38, 0.95) and primary closure (RR 0.58; Crl 0.46, 0.77) to muscle flap.
CONCLUSIONS
Surgical options for perineal wound closure have evolved significantly over the last few decades. There remains no clear consensus on the "best" option, and tailoring to the individual remains a critical factor.
Topics: Humans; Network Meta-Analysis; Perineum; Plastic Surgery Procedures; Postoperative Complications; Surgical Flaps
PubMed: 37843643
DOI: 10.1007/s10151-023-02868-1 -
Journal of Gastrointestinal Surgery :... Nov 2023This systematic review explored different medications and methods for prevention and treatment of pouchitis after restorative proctocolectomy with ileal pouch-anal... (Meta-Analysis)
Meta-Analysis Review
BACKGROUND
This systematic review explored different medications and methods for prevention and treatment of pouchitis after restorative proctocolectomy with ileal pouch-anal anastomosis (IPAA).
METHODS
PubMed, Scopus, and Web of Science were searched for randomized clinical trials that assessed prevention or treatment of pouchitis. The systematic review was reported in line with updated 2020 PRISMA guidelines. Risk of bias in the trials included was assessed using the ROB-2 tool and certainty of evidence was assessed using GRADE. The main outcomes were the incidence of new pouchitis episodes in the preventative studies and resolution or improvement of active pouchitis in the treatment studies.
RESULTS
Fifteen randomized trials were included. A meta-analysis of 7 trials on probiotics revealed significantly lower odds of pouchitis with the use of probiotics (RR: 0.26, 95% CI: 0.16-0.42, I = 20%, p < 0.001) and similar odds of adverse effects to placebo (RR: 2.43, 95% CI: 0.11-55.9, I = 0, p = 0.579). One trial investigated the prophylactic role of allopurinol in preventing pouchitis and found a comparable incidence of pouchitis in the two groups (31% vs 28%; p = 0.73). Seven trials assessed different treatments for active pouchitis. One recorded the resolution of pouchitis in all patients treated with ciprofloxacin versus 67% treated with metronidazole. Both budesonide enema and oral metronidazole were associated with similar significant improvement in pouchitis (58.3% vs 50%, p = 0.67). Rifaximin, adalimumab, fecal microbiota transplantation, and bismuth carbomer foam enema were not effective in treating pouchitis.
CONCLUSIONS
Probiotics are effective in preventing pouchitis after IPAA. Antibiotics, including ciprofloxacin and metronidazole, are likely effective in treating active pouchitis.
Topics: Humans; Pouchitis; Metronidazole; Colitis, Ulcerative; Randomized Controlled Trials as Topic; Proctocolectomy, Restorative; Ciprofloxacin; Anastomosis, Surgical
PubMed: 37815701
DOI: 10.1007/s11605-023-05841-3 -
Journal of Crohn's & Colitis Mar 2024We evaluated short- and long-term outcomes of temporary faecal diversion [FD] for management of refractory Crohn's disease [CD], focusing on outcomes in the biologic era. (Meta-Analysis)
Meta-Analysis
BACKGROUND AND AIMS
We evaluated short- and long-term outcomes of temporary faecal diversion [FD] for management of refractory Crohn's disease [CD], focusing on outcomes in the biologic era.
METHODS
Through a systematic literature review until March 15, 2023, we identified 33 studies [19 conducted in the biologic era] that evaluated 1578 patients with perianal and/or distal colonic CD who underwent temporary FD [with intent of restoring bowel continuity] and reported long-term outcomes [primary outcome: successful restoration of bowel continuity, defined as remaining ostomy-free after reconnection at a minimum of 6 months after diversion or at the end of follow-up]. We calculated pooled rates (with 95% confidence interval [CI]) using random effects meta-analysis, and examined factors associated with successful restoration of bowel continuity.
RESULTS
Overall, 61% patients [95% CI, 52-68%; 50% in biologic era] experienced clinical improvement after FD. Stoma takedown was attempted in 34% patients [28-41%; 37% in biologic era], 6-18 months after diversion. Among patients where bowel restoration was attempted, 63% patients [54-71%] had successful restoration of bowel continuity, and 26% [20-34%] required re-diversion. Overall, 21% patients [17-27%; 24% in biologic era] who underwent FD were successfully restored; 34% patients [30-39%; 31% in biologic era] required proctectomy with permanent ostomy. On meta-regression, post-diversion biologic use and absence of proctitis was associated with successful bowel restoration after temporary FD in contemporary studies.
CONCLUSION
In the biologic era, temporary FD for refractory perianal and/or distal colonic CD improves symptoms in half the patients, and bowel continuity can be successfully restored in a quarter of patients.
Topics: Humans; Crohn Disease; Feces; Proctectomy; Proctitis; Biological Products
PubMed: 37707480
DOI: 10.1093/ecco-jcc/jjad159 -
European Journal of Gastroenterology &... Nov 2023Restorative proctocolectomy (RPC) is the most common surgical procedure to restore gastrointestinal continuity after surgical resection of the colon and rectum.... (Meta-Analysis)
Meta-Analysis
Restorative proctocolectomy (RPC) is the most common surgical procedure to restore gastrointestinal continuity after surgical resection of the colon and rectum. Pouchitis is a common complication with several different modalities that can be used to aid diagnosis. This systematic review and meta-analysis aimed at exploring the sensitivity and specificity these diagnostic modalities. The medical literature was searched using MEDLINE, EMBASE and EMBASE classic and PubMed from 1978 to June 2022. We calculated descriptive statistics using sensitivity, specificity, and false-positive rate of the primary studies and also their positive and negative likelihood ratios, and their diagnostic odds ratios. The screen found 5477 records with 13 studies being included. Faecal lactoferrin was found to have the highest pooled sensitivity and specificity of 98% and 88% respectively with imaging modalities coming in second and faecal calprotectin third with pooled sensitivities and specificities of 87% and 79% and 74% and 81% respectively. Faecal biomarkers particularly lactoferrin and imaging modalities may have an important role to play in diagnosing pouchitis. Importantly due to delays in availability of pouchoscopy, our data supports early ordering of these tests to help delineate from other causes. Further studies are required with larger cohort sizes to further validate these tests.
Topics: Humans; Pouchitis; Lactoferrin; Proctocolectomy, Restorative; Sensitivity and Specificity; Feces
PubMed: 37695613
DOI: 10.1097/MEG.0000000000002638 -
The American Surgeon Jan 2024The aim of this systematic review and meta-analysis is to evaluate clinical, functional, and anorectal physiology outcomes of the side-to-end vs colonic J-pouch (CJP)... (Comparative Study)
Comparative Study Meta-Analysis
BACKGROUND
The aim of this systematic review and meta-analysis is to evaluate clinical, functional, and anorectal physiology outcomes of the side-to-end vs colonic J-pouch (CJP) anastomosis following anterior resection for rectal cancer.
METHODS
A PRISMA-compliant systematic review and meta-analysis was conducted using multiple electronic databases and clinical trial registers and all studies comparing side-to-end vs CJP anastomosis were included. Peri-operative complications, mortality rate, functional bowel, and anorectal outcomes were evaluated.
RESULTS
Eight randomized controlled trials (RCTs) and two observational studies with 1125 patients (side-to-end: n = 557; CJP: n = 568) were included. Of the entire functional bowel outcome parameters analyzed, only the sensation of incomplete bowel evacuation was significant in the CJP group at 6 months [OR: 2.07; 95% CI 1.06 - 4.02, = .03]. Peri- and post-operative clinical parameters were comparable in both groups (total operative time, intra-operative blood loss, anastomotic leak rate, return to theater, anastomotic stricture formation and mortality). Equally, most of the analyzed anorectal physiology parameters (anorectal volume, anal squeeze pressure, maximum anal volume) were not significantly different between the two groups. However, anal resting pressure (mmHg) 2 years post-operatively was noted to be significantly higher in the side-to-end group than that of the CJP configuration [MD: -8.76; 95% CI - 15.91 - 1.61, = .02].
DISCUSSION
Clinical and functional outcomes following CJP surgery and side-to-end coloanal anastomosis are comparable. Neither technique appears to proffer solution to low anterior resection syndrome in the short term but future well-designed; high-quality RCTs with long term follow-up are required.
Topics: Humans; Anal Canal; Anastomosis, Surgical; Colon; Colonic Pouches; Proctectomy; Proctocolectomy, Restorative; Rectal Neoplasms; Rectum; Treatment Outcome
PubMed: 37507144
DOI: 10.1177/00031348231191769 -
PloS One 2023Minimally invasive total mesorectal excision is increasingly being used as an alternative to open surgery in the treatment of patients with rectal cancer. This...
OBJECTIVES
Minimally invasive total mesorectal excision is increasingly being used as an alternative to open surgery in the treatment of patients with rectal cancer. This systematic review aimed to compare the total, operative and hospitalization costs of open, laparoscopic, robot-assisted and transanal total mesorectal excision.
METHODS
This systematic review was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement (PRISMA) (S1 File) A literature review was conducted (end-of-search date: January 1, 2023) and quality assessment performed using the Consensus Health Economic Criteria.
RESULTS
12 studies were included, reporting on 2542 patients (226 open, 1192 laparoscopic, 998 robot-assisted and 126 transanal total mesorectal excision). Total costs of minimally invasive total mesorectal excision were higher compared to the open technique in the majority of included studies. For robot-assisted total mesorectal excision, higher operative costs and lower hospitalization costs were reported compared to the open and laparoscopic technique. A meta-analysis could not be performed due to low study quality and a high level of heterogeneity. Heterogeneity was caused by differences in the learning curve and statistical methods used.
CONCLUSION
Literature regarding costs of total mesorectal excision techniques is limited in quality and number. Available evidence suggests minimally invasive techniques may be more expensive compared to open total mesorectal excision. High-quality economical evaluations, accounting for the learning curve, are needed to properly assess costs of the different techniques.
Topics: Humans; Robotics; Rectal Neoplasms; Proctectomy; Laparoscopy; Hospitalization; Transanal Endoscopic Surgery; Rectum; Treatment Outcome; Postoperative Complications
PubMed: 37506122
DOI: 10.1371/journal.pone.0289090 -
Surgery Sep 2023Idiopathic myointimal hyperplasia of the mesenteric veins is an extremely rare non-thrombotic mesenteric veno-occlusive disease. The management of idiopathic myointimal... (Review)
Review
BACKGROUND
Idiopathic myointimal hyperplasia of the mesenteric veins is an extremely rare non-thrombotic mesenteric veno-occlusive disease. The management of idiopathic myointimal hyperplasia of the mesenteric veins is not well-established, and although surgery is the mainstay of treatment, the optimal operation remains unclear. Therefore, we aimed to perform a systematic review to assess the various surgical procedures and associated outcomes for patients with idiopathic myointimal hyperplasia of the mesenteric veins.
METHODS
A systematic search for articles published from 1946 to April 2022 in MEDLINE, EMBASE, Cinahl, Scopus, Web of Science, and Cochrane Library databases is reported. In addition, we report 4 cases of idiopathic myointimal hyperplasia of the mesenteric veins managed at our institution until March 2023.
RESULTS
A total of 53 studies and 88 patients with idiopathic myointimal hyperplasia of the mesenteric veins were included. Most (82%) were male patients, with a mean age of 56.6 years old. The majority (99%) of patients required surgery. Most reports described the involvement of the rectum and sigmoid colon (81%). The most common surgical procedures were Hartmann's procedure (24%) and segmental colectomy (19%); completion proctectomy with ileal pouch-anal anastomosis was performed in 3 (3.4%) cases. In 6 (6.8%) cases, idiopathic myointimal hyperplasia of the mesenteric veins was suspected preoperatively and managed with elective surgery. Four (4.5%) complications were reported. Nearly all (99%) patients achieved remission with surgical intervention.
CONCLUSION
Idiopathic myointimal hyperplasia of the mesenteric veins is a rare pathologic entity infrequently suspected preoperatively and typically diagnosed after surgical resection. Surgical resection with Hartmann's procedure or segmental colectomy was most commonly performed, with completion proctectomy and ileal pouch-anal anastomosis reserved for cases of extensive rectal involvement. Surgical resection was safe and effective, with a low risk of complications and recurrence. Surgical decision-making should be based on the extent of the disease at the time of presentation.
Topics: Humans; Male; Middle Aged; Female; Hyperplasia; Mesenteric Veins; Colon, Sigmoid; Vascular Diseases; Colectomy
PubMed: 37301609
DOI: 10.1016/j.surg.2023.04.014 -
International Journal of Surgery... Jul 2023
Meta-Analysis
How to reasonably deal with zero-events in meta-analysis of surgery-related outcomes? Oncologic outcomes of intersphincteric resection vs. abdominoperineal resection for lower rectal cancer: a systematic review and meta-analysis.
Topics: Humans; Rectal Neoplasms; Proctectomy; Treatment Outcome; Anal Canal
PubMed: 37300885
DOI: 10.1097/JS9.0000000000000379