A study looking at a device that may help to find certain types of polyps in the bowel (The ADENOMA study)

Cancer type:

Bowel (colorectal) cancer





This was a study to see if a device called Endocuff Vision made it easier to find adenomas during a procedure to look inside the bowel (colonoscopy). 

Polyps Open a glossary item are growths inside the bowel. Most bowel cancers start when a type of polyp called an adenoma Open a glossary item becomes cancerous.

This study was open for people to join between 2014 and 2016. These results were published in 2018.

More about this trial

Doctors use a colonoscopy to look inside the bowel to find polyps. They pass a thin, flexible tube with a camera at the end into your back passage and up into your bowel. The tube is a colonoscope.

There are a number of reasons people may need to have a colonoscopy. These include people who:

  • are having possible symptoms of bowel cancer
  • need regular screening tests because they have a higher than usual risk of developing bowel cancer
  • have had a test which showed there was blood in their poo

The doctor or nurse doing the test can see the polyps and remove them if necessary. Removing these growths reduces the risk of bowel cancer.

In this study, some people had a standard colonoscopy. And some had a colonoscopy with a device called an Endocuff Vision attached to the end of the colonoscope. This could make it easier to see and remove polyps. It helps by holding back the folds of the bowel to give a clear view.

The main aims of the study were to find out whether the Endocuff Vision device:

  • helped doctors to identify polyps in the bowel
  • helped them identify adenomas, the type of polyp most likely to develop into bowel cancer
  • caused more pain or discomfort than a standard colonoscopy
  • took longer to use than the standard colonoscopy

Summary of results

The team found the Endocuff Vision device did increase the number of adenomas that were seen. 

About this trial
This was a randomised trial. Everyone was put into 1 of 2 groups. Neither they nor their doctor chose which group they were in. 

1,772 people took part:

  • 884 people were in the standard colonoscopy group
  • 888 people were in the Endocuff Vision colonoscopy group

Of the 1,772 people, 797 (45%) had a bowel screening test done before they had joined the trial:

  • 403 people had the standard colonoscopy
  • 394 people had the Endocuff Vision colonoscopy

When the trial team looked at the results they based it on what colonoscopy people were due to have and not which one they actually had. This is called an intention to treat analysis Open a glossary item. Doing this means the results they get are better, clearer and fairer. 

The trial team compared the standard colonoscopy with the Endocuff Vision colonoscopy. 

They found that 683 people had at least 1 adenoma in their bowel. This was:

  • 320 people (36%) who had the standard colonoscopy
  • 363 people (41%) who had the Endocuff Vision colonoscopy

The research team then analysed the results in more detail. 

They looked at the 797 people who were having a colonoscopy because a test on their poo had shown it contained some blood (FOB+). In this group, more people who had the Endocuff Vision colonoscopy were diagnosed with at least 1 adenoma. It was:

  • 205 out of 403 people (51%) who had the standard colonoscopy
  • 243 out of 394 people (62%) who had the Endocuff Vision colonoscopy

They also looked at 975 people who hadn’t had a test that showed they had blood in their poo (FOB-). The number of people who were diagnosed with an adenoma was the same in each group:

  • 115 out of 481 people (24%) who had the standard colonoscopy
  • 120 out of 494 people (24%) who had the Endocuff Vision colonoscopy

What people thought about the test
The team asked people about the discomfort caused by putting the tube up the back passage. They found that 76 people (8.6%) reported some discomfort using the Endocuff Vision device. For all other measures of comfort they found that it was the same as for the standard colonoscopy. 

The trial team concluded that the Endocuff Vision device:

  • increased the number of adenomas found
  • didn’t increase the discomfort of having a colonoscopy

They recommend the Endocuff Vision device is used for people who need a colonoscopy because they have a higher chance of having an adenoma Open a glossary item. An example is people who have had the screening test showing a small amount of blood in their poo.

Where this information comes from    
We have based this summary on information from the research team. The information they sent us has been reviewed by independent specialists (peer reviewed Open a glossary item) and published in a medical journal. The figures we quote above were provided by the trial team who did the research. We have not analysed the data ourselves.

Recruitment start:

Recruitment end:

How to join a clinical trial

Please note: In order to join a trial you will need to discuss it with your doctor, unless otherwise specified.

Please note - unless we state otherwise in the summary, you need to talk to your doctor about joining a trial.

Chief Investigator

Professor Colin Rees

Supported by

ARC Medical Design Ltd
NIHR Clinical Research Network: Cancer
South Tyneside NHS Foundation Trust

If you have questions about the trial please contact our cancer information nurses

Freephone 0808 800 4040

Last review date

CRUK internal database number:


Please note - unless we state otherwise in the summary, you need to talk to your doctor about joining a trial.

Alan took part in a clinical trial for bowel cancer patients

A picture of ALan

“I think it’s essential that people keep signing up to these type of trials to push research forward.”

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