Around 1 in 5 people diagnosed with cancer in the UK take part in a clinical trial.
A study to see how well a new way of screening for Barrett's oesophagus works (BEST2)
This study is looking at a new screening tool called cytosponge for a condition called Barrett’s oesophagus. This trial is supported by Cancer Research UK.
In Barrett’s oesophagus, there are changes in the normal cells that line the food pipe (oesophagus or gullet). This is caused by acid coming back up the food pipe from the stomach (acid reflux), which can cause symptoms such as indigestion and heartburn.
Over a long period of time, people with Barrett's oesophagus can develop ulcers or a narrowing of the oesophagus. It is also recognised as a risk factor for oesophageal cancer. People with Barrett’s oesophagus usually have tests every year or 2 to check for these conditions.
Barrett’s oesophagus can be diagnosed by having a
Doctors are trying to find a simple way of screening people who are at high risk of getting Barrett’s oesophagus. If they can detect Barrett’s oesophagus in more people, they may be able to develop ways of stopping the disease becoming oesophageal cancer.
In this study, the researchers are trying to find out if something called a cytosponge can pick up Barrett’s oesophagus. They will also look for markers that may show which people are at a higher risk of Barrett’s oesophagus becoming cancer. In the future this could help them to work out who needs more careful monitoring or treatment, but will not affect any further screening or treatment for people taking part in this trial.
Who can enter
You can enter this trial if you
- Have Barrett’s oesophagus, or you have heart burn and indigestion and are considered to be at high risk of Barrett’s oesophagus
- Are due to have an endoscopy
- Are at least 18 years old
You cannot enter this trial if you
- Have a
tumourin your oesophagus, in the area of your throat at the back of your mouth (the oropharynx), or at the point where your oesophagus meets your stomach (the gastro oesophageal junction)
- Have difficulty swallowing
- Have a narrowing of your oesophagus (stricture) or swollen veins near to the lining of the oesophagus (varices)
- Are taking drugs to thin your blood (anticoagulants)
- Have had a stroke in the last 6 months that affected your swallowing
- Don’t eat beef (this is because you must swallow a capsule that is coated in gelatine which is made from beef)
This study aims to recruit up to 1,400 people. Some of the people taking part are known to have Barrett’s oesophagus, some have a high risk of developing it. Everybody taking part will have an endoscopy as well. This means the researchers can compare the findings of the cytosponge test with the results of the endoscopy to see how accurate the cytosponge is.
If you agree to take part, you will have the test on the same day as you have your endoscopy. A research nurse will ask you some questions about your general health and lifestyle as well as measuring your height and weight. Then they will ask you to swallow a small capsule called a cytosponge, along with a drink of water. The capsule contains a sponge that is attached to a string.
The sponge is covered in gelatine which takes about 5 minutes to dissolve in your stomach. The sponge is then gently removed by pulling the string. You may have a spray to numb your throat. As the sponge is pulled up and out of your mouth, it collects cells from the lining of your oesophagus, which can then be studied in the laboratory.
View a transcript of the video about the cytosponge.
After having the cytosponge test, you have your endoscopy as planned. Depending on the results, you may have more endoscopies in the future. The research team may ask you to have the cytosponge test again. But you do not have to agree to this if you don’t want to.
You have the cytosponge test on the same day as your endoscopy, so there are no extra hospital visits.
Having the cytosponge test is not painful and people who took part in an earlier study didn’t have any other serious side effects. You may have a mild sore throat for about 24 hours. But this is also a common side effect of having an endoscopy, so you are unlikely to notice any difference if you have the cytosponge test. Your doctor will talk to you about the possible risks of having an endoscopy before you agree to have the test.
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.
Dr Rebecca Fitzgerald
Cambridge University Hospitals NHS Foundation Trust
Cancer Research UK
Experimental Cancer Medicine Centre (ECMC)
Medical Research Council (MRC)
NIHR Clinical Research Network: Cancer
University of Cambridge
This is Cancer Research UK trial number CRUK/10/041.