What is the risk of anastomotic leakage after anterior resection for rectal cancer?
Anastomotic leakage is a serious complication where the surgical connection (anastomosis) between the remaining bowel ends leaks intestinal contents. After anterior resection for rectal cancer, the risk of leakage is a major concern. Studies report leakage rates around 7% to 10%, but individual risk depends on patient and surgical factors.
What the research says
A large Italian study of 5,398 patients found an overall leak rate of 10.2%, with a mean time to leak of 6.8 days and a 30-day leak-related mortality of 2.6% 9. A Chinese study of 1,840 patients reported a 7.5% leak rate 11. Another study of 901 patients found an 8.9% overall leak rate and 4.7% for severe (Grade C) leaks 5. Risk factors identified across studies include male sex 911, higher body mass index 9, tumor location 9, advanced T stage (T3-T4) 911, longer operative time 5, and neoadjuvant chemoradiotherapy 5. A diverting stoma did not reduce the leak rate but decreased leak severity and reoperation rate 911. A transanal drainage tube did not significantly reduce leak rate in a randomized trial 10.
What to ask your doctor
- What is my personal risk of anastomotic leakage based on my age, sex, and tumor stage?
- Would a diverting stoma be recommended for me to reduce the severity of a potential leak?
- How will my recovery be monitored for signs of leakage after surgery?
- What symptoms of anastomotic leakage should I watch for after discharge?
This question is drawn from common patient questions about this topic and answered using cited medical research. We do not provide individualized advice.