Browser does not support script.
Skip to main content
search here
Macmillan and Cancerbackup merged in 2008. Together we provide free, high quality information for people affected by cancer through our publications, website and phone service. Find out more|.
Find out how we produce our information|
Clinical trials may be carried out to:
Trials are the only reliable way to find out if a different operation, type of chemotherapy, radiotherapy, or other treatment is better than what is already available.
You may be asked to take part in a treatment research trial. There can be many benefits in doing this. Trials help to improve knowledge about cancer and develop new treatments. You will also be carefully monitored during and after the study. Usually, several hospitals around the country take part in these trials.
It’s important to bear in mind that some treatments which look promising at first are often later found not to be as good as existing treatments, or to have side effects that outweigh the benefits.
If you decide not to take part in a trial, your decision will be respected and you do not have to give a reason. If you do decide to take part, you are allowed to withdraw from the trial at any time.
In either case, there will be no change in the way that you are treated by the hospital staff and you will be offered the standard treatment for your situation.
Many blood and tumour samples may be taken to help make the right diagnosis. You may be asked for your permission to use some of your samples for research into cancer. If you’re taking part in a trial you may also be asked to give other samples which can be frozen and stored for future use, when new research techniques become available. These samples will have your name removed so you can’t be identified.
The research may be carried out at the hospital where you are treated, or at another one. This type of research takes a long time, and it may be many years before the results are known.
The samples will be used to increase knowledge about the causes of cancer and its treatment. This research will hopefully improve the outlook for future patients.
Our section on clinical trials| describes the process in more detail. It includes details of databases you can search to look at trials for rectal cancer.
For answers, support or just a chat, call the Macmillan Support Line free (Monday to Friday, 9am-8pm)
If you have any questions about cancer, need support or just want someone to talk to, ask Macmillan.