
Around 1 in 5 people diagnosed with cancer in the UK take part in a clinical trial.
Please note - this trial is no longer recruiting patients. We hope to add results when they are available.
This study is looking at laser treatment for abnormal cells around the anus. It is looking at how the treatment affects the function of the anus.
These abnormal cells are called anal intraepithelial neoplasia (AIN). This study is open to men who have sex with men and have AIN.
High grade AIN means that the cells around and in the anus look very abnormal and could develop into anal cancer. You are at higher risk of anal cancer if you are a man who has sex with men.
One treatment for AIN is using lasers to remove the abnormal cells. The long term effects of laser treatment on the function and structure of the anus aren’t known. These effects could include changes:
In this study the researchers want to find out more about these long term effects. The team are also looking at what sensations you have in the anus when you have the laser treatment.
To find this out you have 3 tests before your treatment and the same tests sometime after. These test the function and structure of the anus.
The aims of this study are to find:
The following bullet points are a summary of the entry conditions for this study. Talk to your doctor or the study team if you are unsure about any of these. They will be able to advise you.
Who can take part
You may be able to join this study if all of the following apply. You:
Who can’t take part
You cannot join this study if any of these apply. You:
This is a pilot study. The team need 20 men to join.
You have the laser treatment at the Homerton University Hospital.
You see the study team to have 3 tests and to fill in some questionnaires before your laser treatment. These are usually done on the same day as your treatment.
Strength test
This tests the function or strength of the muscles in your anus. The researcher puts a thin plastic coated tube (4mm) just into the anus. It measures the pressure of the muscles when at rest and when you squeeze your anus shut. They inflate a balloon in your back passage (rectum) to see how sensitive it is. This test takes about 10 minutes.
Structure of the anus test
In this test they put a 2cm ultrasound probe with lubricant jelly on it into your anal canal. It takes an ultrasound scan of the anal muscles. This takes 5 to 10 minutes.
Sensation test
For this test they put a ring like a small butt plug into the anus. A low level electric current goes through the ring. At first you won’t feel it. As they increase the stimulus (electric current) you will feel a tingling sensation. When you say you feel this tingling they stop the test. They repeat this test again. This test takes about 5 minutes.
All these tests have a long track record and are safe to use. People don’t usually mind having them.
The team tell you the results of the tests and what they mean.
You have the same 3 tests repeated 6 months after treatment.
Questionnaires
You fill in a few questionnaires:
The questions ask about:
You have the tests and the treatment at a specially designed ward at the Homerton University Hospital.
The study team phone you 4 weeks after treatment to find out how you are and to ask you the questions in the questionnaires.
They then see again at 6 months to do the 3 tests. This is the usual time for your follow up after the laser treatment.
These 3 tests are safe. The study team don’t expect any side effects from them. But if you feel any discomfort during the tests tell the researcher and they will stop the test.
Your doctor will tell you about the laser treatment.
Please note: In order to join a trial you will need to discuss it with your doctor, unless otherwise specified.
Tamzin Cuming
Homerton University Hospital NHS
University College London (UCL)
If you have questions about the trial please contact our cancer information nurses
Freephone 0808 800 4040
Around 1 in 5 people diagnosed with cancer in the UK take part in a clinical trial.