On long-term outcome of anastomotic leakage after anterior resection for rectal cancer

Background: Anterior resection has the benefit of enabling bowel continuity, but suffer from a common complication in anastomotic leakage.There is a paucity in previous research of long-term implications of anastomotic leakage after anterior resection.Aims: To gain general knowledge of the morbidity related to anastomotic leakage after anterior resection for rectal cancer, specific aims were:I.To investigate late detected anastomotic leakage after anterior resection regarding incidence, and evaluate its clinical features and clinical variables associated to late detected anastomotic leakage.II.To evaluate how often bowel continuity is restored in long-term follow-up after anastomotic leakage in anterior resection and clinical factors related to a permanent stoma.III.To explore rectal contrast studies of patients with anastomotic leakage for predicitve features related to an outcome of permanent stoma.IV.To evaluate the effect of anastomotic leakage after anterior resection on long-term bowel dysfunctionV.To evaluate the effect of anastomotic leakage after anterior resection on Quality of Life, as well as to evaluate the effect of maintained bowel continuity in anastomotic leakage patients on Quality of Life.Methods: Paper I-III, a retrospective cohort of patients subjected to anterior resection in the Southern healthcare region of Sweden was used to identify patients with anastomotic leakage according to a study protocol definition. This group of anastomotic leakage patients was investigated with respect to late leakage, permanent stoma in long-term follow-up and radiological features associated with an outcome of permanent stoma. In paper IV and V a retrospective cohort of patients subjected to anterior resection in the Southern, Western and Northern healthcare regions of Sweden 2007-2013 was used, the effect of anastomotic leakage on bowel dysfunction and Quality of Life was investigated using propensity score matching models.Results and conclusions: Anastomotic leakage after anterior resection is associated with signifcant long-term morbidity. Late detected anastomotic leakage after anterior resection is common and related to use of a defunctioning stoma at anterior resection. Two-thirds of all patients with anastomotic leakage after anterior resection end up with a permanent stoma in long-term follow-up, wheras in patients with bowel continuity there is a doubled risk of severe bowel dysfunction. However, no superiority in Quality of Life related to outcome in bowel continuity could be demonstrated

High Risk of Low Anterior Resection Syndrome in Long-term Follow-up After Anastomotic Leakage in Anterior Resection for Rectal Cancer

BACKGROUND: Low anterior resection syndrome is common after sphincter-sparing surgery, but it is unclear to what extent anastomotic leakage after anterior resection contributes to this condition. OBJECTIVE: The aim of this study is to assess the long-term effect of anastomotic leakage on the occurrence of major low anterior resection syndrome. DESIGN: This is a retrospective observational cohort study evaluating low anterior resection syndrome 4 to 11 years after index surgery. After propensity score-matching using the covariates sex, age, tumor stage, comorbidity, neoadjuvant treatment, extent of mesorectal excision, and defunctioning stoma at index surgery, the effect of anastomotic leakage on low anterior resection syndrome was investigated using relative risk and 95% CI. SETTINGS: This multicenter study included patients from 15 Swedish hospitals between 2007 and 2013. PATIENTS: Patients who underwent anterior resection for rectal cancer were included. MAIN OUTCOME MEASURES: Outcome measures included patient-reported major low anterior resection syndrome, obtained via a postal questionnaire that included a question on stoma status. RESULTS: Among 1099 patients, 653 (59.4%) responded in at a median of 83.5 (interquartile range 66 to 110) months postoperatively. After excluding patients with residual stoma or incomplete responses, 544 remained; of these, 42 had anastomotic leakage. Patients with anastomotic leakage were more likely to have major low anterior resection syndrome (66.7% [28/42]) than patients without leakage (45.8% [230/502]). After matching, anastomotic leakage was significantly related to major low anterior resection syndrome (relative risk 2.3; 95% CI 1.4-3.9) and the individual symptom of urgency (relative risk 2.1; 95% CI 1.1-4.1). LIMITATIONS: This study was limited by its retrospective observational study design. CONCLUSIONS: In long-term follow-up, major low anterior resection syndrome is common after anterior resection for rectal cancer. Anastomotic leakage appears to increase the risk of major low anterior resection syndrome, with urgency as a major contributing symptom. See Video Abstract at http://links.lww.com/DCR/B868

Long-term Outcomes of Endoscopic Vacuum Therapy and Transanal Drainage for Anastomotic Leakage After Anterior Resection

Background/Aim: Anastomotic leakage (AL) after anterior resection for rectal cancer occurs in up to 26% of patients. In the last decade, endoscopic vacuum therapy (EVT) has gained interest as a treatment option for AL. This study aimed to compare the clinical success rate of EVT versus transanal drainage (TD) in AL treatment and investigate whether the frequency of bowel continuity differed. Patients and Methods: Patients treated for rectal cancer at the Skåne University Hospital, Sweden between 2009-2018 were identified through the Swedish Colorectal Cancer Registry (SCRCR). Patient characteristics, operative and AL data were retrieved by SCRCR and chart review. Results: Out of 1,095 patients subjected to rectal cancer surgery, 361 patients had undergone anterior resection. AL occurred in 39 patients, of these 14 patients were treated with EVT and 17 with TD. Bowel continuity was achieved in 50% of patients treated with EVT and 65% of patients treated with TD (p=0.28). The patients were under treatment for a median period of 24.5 days (IQR=11-36 days) when treated with EVT and 37 days (IQR=17-51 days) with TD. Conclusion: No superiority of EVT treatment could be shown in restoring bowel continuity. This questions the role of EVT in AL treatment after anterior resection

The Impact of Anastomotic Leakage on Long-term Function after Anterior Resection for Rectal Cancer

BACKGROUND: It is still not clear whether anastomotic leakage after anterior resection for rectal cancer affects long-term functional outcome. OBJECTIVE: This study aimed to evaluate how anastomotic leakage following anterior resection for rectal cancer influences defecatory, urinary, and sexual function. DESIGN: In this retrospective population-based cohort study, patients were identified through the Swedish Colorectal Cancer Registry, which was also used for information on the exposure variable anastomotic leakage and covariates. SETTINGS: A nationwide register was used for including patients. PATIENTS: All patients undergoing anterior resection for rectal cancer in Sweden from April 2011 to June 2013 were included. MAIN OUTCOME MEASURES: Outcome was any defecatory, sexual, or urinary dysfunction, assessed 2 years after surgery by a postal questionnaire. The association between anastomotic leakage and function was assessed in multivariable logistic and linear regression models, with adjustment for confounding. RESULTS: Response rate was 82%, resulting in 1180 included patients. Anastomotic leakage occurred in 7.5%. A permanent stoma was more common among patients with leakage (44% vs 9%; p < 0.001). Patients with leakage had an increased risk of aid use for fecal incontinence (OR, 2.27; 95% CI, 1.20-4.30) and reduced sexual activity (90% vs 82%; p = 0.003), whereas the risk of urinary incontinence was decreased (OR, 0.53; 95% CI, 0.31-0.90). A sensitivity analysis assuming that a permanent stoma was created because of anorectal dysfunction strengthened the negative impact of leakage on defecatory dysfunction. LIMITATIONS: Limitations include the use of a questionnaire that had not been previously validated, underreporting of anastomotic leakage in the register, and small patient numbers in the analysis of sexual symptoms. CONCLUSIONS: Anastomotic leakage was found to statistically significantly increase the risk of aid use due to fecal incontinence and reduced sexual activity, although the impact on defecatory dysfunction might be underestimated, because permanent stomas are sometimes fashioned because of anorectal dysfunction. Further research is warranted, especially regarding urogenital function

Radiological findings in anastomotic leakage after anterior resection may predict a permanent stoma

Background: Permanent stoma (PS) is common following treatment of anastomotic leakage (AL) after anterior resection (AR) and ways of predicting successful treatment outcome are missing.Purpose: To explore radiological variables in rectal contrast studies in their relation to end-result of PS following treatment for AL after AR.Material and Methods: The Swedish Cancer Registry (SCRCR) was explored for AL cases after AR for rectal cancer in patients operated in the region of Skåne from 1 January 2001 to 31 December 2011. Among identified AL cases, patients subjected to radiological imaging consistent with AL were evaluated according to a predetermined set of radiological variables. Information of PS as the end-result after AL treatment were retrieved from medical records.Results: Thirty-two patients had radiological imaging available for analysis confirming AL after AR; PS rate after a median follow-up of 87 months (range = 21-165) after AR was 62%. Radiological findings compatible with abscess (P = 0.023) and a leak size ≤6 mm (P = 0.049) were significantly associated with PS.Conclusion: In this limited explorative study, our findings suggest that abscess status and leak size could correspond to outcome of PS in treatment for AL after AR. Additional studies are warranted to further explore this subject

Evaluation of a quality improvement intervention to reduce anastomotic leak following right colectomy (EAGLE): pragmatic, batched stepped-wedge, cluster-randomized trial in 64 countries

Background Anastomotic leak affects 8 per cent of patients after right colectomy with a 10-fold increased risk of postoperative death. The EAGLE study aimed to develop and test whether an international, standardized quality improvement intervention could reduce anastomotic leaks. Methods The internationally intended protocol, iteratively co-developed by a multistage Delphi process, comprised an online educational module introducing risk stratification, an intraoperative checklist, and harmonized surgical techniques. Clusters (hospital teams) were randomized to one of three arms with varied sequences of intervention/data collection by a derived stepped-wedge batch design (at least 18 hospital teams per batch). Patients were blinded to the study allocation. Low- and middle-income country enrolment was encouraged. The primary outcome (assessed by intention to treat) was anastomotic leak rate, and subgroup analyses by module completion (at least 80 per cent of surgeons, high engagement; less than 50 per cent, low engagement) were preplanned. Results A total 355 hospital teams registered, with 332 from 64 countries (39.2 per cent low and middle income) included in the final analysis. The online modules were completed by half of the surgeons (2143 of 4411). The primary analysis included 3039 of the 3268 patients recruited (206 patients had no anastomosis and 23 were lost to follow-up), with anastomotic leaks arising before and after the intervention in 10.1 and 9.6 per cent respectively (adjusted OR 0.87, 95 per cent c.i. 0.59 to 1.30; P = 0.498). The proportion of surgeons completing the educational modules was an influence: the leak rate decreased from 12.2 per cent (61 of 500) before intervention to 5.1 per cent (24 of 473) after intervention in high-engagement centres (adjusted OR 0.36, 0.20 to 0.64; P &lt; 0.001), but this was not observed in low-engagement hospitals (8.3 per cent (59 of 714) and 13.8 per cent (61 of 443) respectively; adjusted OR 2.09, 1.31 to 3.31). Conclusion Completion of globally available digital training by engaged teams can alter anastomotic leak rates. Registration number: NCT04270721 (http://www.clinicaltrials.gov)