Definition and grading of anastomotic leakage following anterior resection of the rectum: a proposal by the International Study Group of Rectal Cancer.

OBJECTIVE: The aim of this randomized multicenter trial was to assess the rate of symptomatic anastomotic leakage in patients operated on with low anterior resection for rectal cancer and who were ...

Defunctioning stoma reduces symptomatic anastomotic leakage after low anterior resection of the rectum for cancer : A randomized multicenter trial

Background The most important surgical complication following rectal resection with anastomosis is symptomatic anastomotic leakage. which is associated with a 6-22 per cent mortality rate. The aim of this retrospective study was to evaluate the risk factors for clinical anastomotic leakage after anterior resection for cancer of the rectum. Methods From 1980 to 1995, 272 consecutive anterior resections for rectal cancer were performed by the same surgical team; 131 anastomoses were situated 5 cm or less from the anal verge. The associations between clinical anastomotic leakage and 19 patient-, tumour-, surgical- and treatment-related variables were studied by univariate and multivariate analysis. Results The rate of clinical anastomotic leakage was 12 per cent (32 of 272). Multivariate analysis of the overall population showed that only male sex and level of anastomosis were independent factors for development of anastomotic leakage. The risk of leakage was 6.5 times higher for anastomoses situated less than 5 cm from the anal verge than for those situated above 5 cm; it was 2.7 times higher for men than for women. In a second analysis of low anastomoses (5 cm or less from the anal verge; = 131), obesity was statistically associated with leakage. Conclusion A protective stoma is suitable after sphincter-saving resection for rectal cancer for anastomoses situated at or less than 5 cm from the anal verge, particularly for men and obese patients.

Risk factors for anastomotic leakage after resection of rectal cancer

Background: Anastomotic leakage is a major complication of rectal cancer surgery. The aim of this study was to investigate risk factors associated with symptomatic anastomotic leakage after total mesorectal excision (TME). Methods: Between 1996 and 1999, patients with operable rectal cancer were randomized to receive short-term radiotherapy followed by TME or to undergo TME alone. Eligible Dutch patients who underwent an anterior resection (924 patients) were studied retrospectively. Results: Symptomatic anastomotic leakage occurred in 107 patients (11.6 per cent). Pelvic drainage and the use of a defunctioning stoma were significantly associated with a lower anastomotic failure rate. A significant correlation between the absence of a stoma and anastomotic dehiscence was observed in both men and women, for both distal and proximal rectal tumours. In patients with anastomotic failure, the presence of pelvic drains and a covering stoma were both related to a lower requirement for surgical reintervention. Conclusion: Placement of one or more pelvic drains after TME may limit the consequences of anastomotic failure. The clinical decision to construct a defunctioning stoma is supported by this study.

Risk factors for anastomotic failure after total mesorectal excision of rectal cancer

Background
Anastomotic leak (AL) represents a dreaded complication following colorectal surgery, with a prevalence of 1–19 per cent. There remains a lack of consensus regarding factors that may predispose to AL and the relative risks associated with them. The objective was to perform a systematic review of the literature, focusing on the role of preoperative, intraoperative and postoperative factors in the development of colorectal ALs.

Methods
A systematic review was performed to identify adjustable and non-adjustable preoperative, intraoperative and postoperative factors in the pathogenesis of AL. Additionally, a severity grading system was proposed to guide treatment.

Results
Of 1707 papers screened, 451 fulfilled the criteria for inclusion in the review. Significant preoperative risk factors were: male sex, American Society of Anesthesiologists fitness grade above II, renal disease, co-morbidity and history of radiotherapy. Tumour-related factors were: distal site, size larger than 3 cm, advanced stage, emergency surgery and metastatic disease. Adjustable risk factors were: smoking, obesity, poor nutrition, alcohol excess, immunosuppressants and bevacizumab. Intraoperative risk factors were: blood loss/transfusion and duration of surgery more than 4 h. Stomas lessen the consequences but not the prevalence of AL. In the postoperative period, CT is the most commonly used imaging tool, with or without rectal contrast, and a C-reactive protein level exceeding 150 mg/l on day 3–5 is the most sensitive biochemical marker. A five-level classification system for AL severity and appropriate management is presented.

Conclusion
Specific risk factors and their potential correction or indications for stoma were identified. An AL severity score is proposed to aid clinical decision-making.

Systematic review of preoperative, intraoperative and postoperative risk factors for colorectal anastomotic leaks.

Background The aim of this retrospective study was to compare the risk of local recurrence between two groups of patients with low rectal cancer treated by either abdominoperineal resection (APR) or anterior resection.

Methods From 1982 to 1992, 106 low rectal cancers (tumour situated 3–8 cm from the anal verge), of Dukes stage B and C were treated by curative surgery, 52 by APR and 54 by anterior resection. Mean follow-up was 60 months after APR and 50 months after anterior resection.

Results The local recurrence rate of low rectal cancer was 16 of 52 (31 per cent) after APR and 15 of 54 (28 per cent) after anterior resection. The risk of local recurrence in univariate and multivariate analysis was not associated with clinical and histological variables, nor with the type of intervention.

Conclusion Sphincter-saving resection can be performed for low rectal cancer without an increased risk of local recurrence.

P. Michel

Papers

Risk factors for anastomotic leakage after resection of rectal cancer

Local recurrence of low rectal cancer after abdominoperineal and anterior resection