Imagine waking up with a stomach ache that won't go away. You visit a doctor who finds a growth in your colon. That growth is called a polyp. Most polyps are harmless. But some can turn into cancer if left alone. Doctors must remove them before they grow too big.
For years, doctors have used two main tools to do this job. One tool is called precut endoscopic mucosal resection. Doctors often call it EMR-P. The other tool is called endoscopic submucosal dissection. Doctors call it ESD. Both tools use a camera and tiny wires to reach inside the gut.
EMR-P is faster. It takes less time to perform. ESD takes longer because the doctor works more carefully. This speed difference has made many doctors prefer the quicker option. But speed does not always mean better results for the patient.
The Hidden Risk Of Speed
Large polyps are tricky to remove. They can be bigger than a grape. When a polyp is large, the doctor must cut it out in one single piece. If the piece breaks apart, some cancer cells might stay behind. These leftover cells can grow back later.
The new study looked at many different reports to compare the two methods. Researchers found a clear difference between them. The faster method failed to remove the whole polyp in many cases. The slower method succeeded much more often.
Think of the colon like a long tunnel. The polyp is a bump on the wall of that tunnel. EMR-P cuts the bump off quickly. It is like snipping a branch off a tree. Sometimes the branch snaps in half during the cut.
ESD works differently. It lifts the bump up first. Then the doctor cuts it off cleanly. This is like lifting a heavy rock before removing it. The lifting step takes more time. But it ensures the rock comes out whole.
The study team reviewed nine different reports. These reports included data from 1460 patients. The numbers tell a clear story about success rates.
The chance of removing the whole polyp was much lower with EMR-P. The odds were 0.15 for that method. That number is very low. For ESD, the odds were much higher. The chance of a complete removal was 0.50 for EMR-P. This means half the time the removal was incomplete.
For polyps between 20 and 30 millimeters, the results were similar. But for larger polyps, ESD was clearly superior. The study also checked for safety issues. There was no difference in bleeding or holes in the gut wall. Both methods were equally safe.
The Trade-Off For Patients
Patients often worry about the time they spend in the hospital. A shorter procedure means they can go home sooner. EMR-P does take less time. The average time saved was about 29 minutes. This is a real benefit for the patient.
But the risk of leaving cancer cells behind is a bigger worry. If a polyp is not removed completely, the patient might need another surgery later. That second surgery is much more dangerous than the first one. The time saved on the first procedure might not be worth the risk of a second trip to the hospital.
This doesn't mean this treatment is available yet.
Doctors must weigh these factors carefully. They need to know the size of the polyp before choosing a method. Small polyps are easy to handle. Large polyps need the careful approach of ESD. The study suggests using ESD for bigger growths to ensure a clean removal.
What Comes Next
This research helps doctors make better choices. It gives them data to talk to patients about options. Some patients might prefer the faster method if their polyp is small. Others might prefer the safer method if their polyp is large.
More studies will follow this one. Researchers will look at new tools and techniques. They will also check if combining methods works better. The goal is always to remove the polyp safely and completely.
Patients should talk to their doctor about these options. Knowing the size of the polyp helps the doctor choose the right tool. A complete removal is the best way to prevent cancer. Taking the extra time for a safer cut is often the smartest choice.