Does endoscopic submucosal dissection remove colorectal polyps in one piece better than EMR-P?
For removing large colorectal polyps, getting the whole polyp out in one piece (en bloc resection) is important for accurate diagnosis and lower recurrence. Endoscopic submucosal dissection (ESD) and precut endoscopic mucosal resection (EMR-P) are two advanced techniques. A 2025 meta-analysis directly compared them and found that ESD is much more likely to achieve en bloc resection, though it takes longer 1.
What the research says
A meta-analysis of nine studies with 1,460 patients found that EMR-P had significantly lower rates of en bloc resection compared to ESD (odds ratio 0.15, meaning EMR-P was about 85% less likely to achieve en bloc removal) 1. Complete histologic resection (removing all abnormal tissue with clear margins) was also lower with EMR-P (odds ratio 0.50) 1. However, for polyps 20-30 mm in size, there was no significant difference between the two methods for either en bloc or complete resection 1. Procedure time was shorter for EMR-P by about 29 minutes on average 1. Other studies confirm that ESD achieves high en bloc resection rates (97.3% in one study) but note that submucosal fibrosis (scarring) can lower success 6. The American Gastroenterological Association advises that ESD is appropriate for lesions too large for en bloc EMR or with suspected cancer 7.
What to ask your doctor
- Based on my polyp size and location, is ESD or EMR-P recommended for me?
- What are the risks of perforation or bleeding with each technique?
- How does the longer procedure time for ESD affect my sedation or recovery?
- If my polyp is 20-30 mm, are the outcomes similar enough that EMR-P might be preferred?
- What is your experience with ESD for colorectal polyps?
This question is drawn from common patient questions about this topic and answered using cited medical research. We do not provide individualized advice.