
“I think it’s really important that people keep signing up to these type of trials to push research forward.”
This study looked at the possibility of doing a larger trial to compare different ways of treating high risk bladder cancer. High risk bladder cancer is more likely to:
The trial was for people whose cancer hadn’t grown into the muscle wall of the bladder (early bladder cancer).
It was open for people to join between 2016 and 2018. The team published the results in 2020.
When this trial was done, the usual treatments for high risk early bladder cancer were:
Surgery to remove the bladder is a big operation but it is a safe treatment and works well. Doctors weren’t sure if surgery or BCG worked best in the long term.
BCG is a vaccine. It seems to help cells of the to grow and become very active in the bladder lining. These cells probably kill off any cancer cells that might grow back or have been left behind. This is called immunotherapy.
At the time of this trial, some research suggested surgery might be over treatment for some people. So researchers wanted to find out more about the best way to treat this type of cancer. First, they needed to find out if it was possible to do this type of study. To find this out they ran a feasibility study.
The main aim of this study was to see if people were willing to take part.
The team found that it wouldn’t be possible to run a larger trial comparing the treatments. This was because it was difficult to find enough people to take part in this study.
Study design
The team screened 407 people who they thought might be suitable to take part. Of those, 215 people fitted the and the team asked 185 to join.
51 people were and 50 agreed to be
Of those, 43 people had their trial treatment:
Those who had BCG had it for up to 1 year as long as it was working and the side effects weren’t too bad.
The team followed the people who took part for up to a year. Those who had BCG had regular tests to look inside the bladder (). Everyone also had regular scans to check if the cancer had spread.
Results
Why people didn’t join the study
The team looked at why some people, who had been asked to take part didn’t want to. They gave the following reasons:
Results for the BCG group
23 people had BCG into the bladder.
After the first 6 weeks of treatment everyone had a cystoscopy to look inside the bladder. The team:
At 4 months they had the results for 16 people. They found:
At 4 months follow up, 4 people went on to have surgery to remove the bladder.
Everyone had regular CT scans during the trial. At the end of the trial they found that 2 people had bladder cancer that had spread elsewhere in the body.
Results for people who had surgery
20 people had surgery to remove the bladder. At 12 month follow up, information was available for 9 people and of these 9, everyone was free of cancer.
Quality of life
The research team asked people taking part to fill out a quality of life questionnaire before, during and after treatment.
The results showed that there wasn’t much of a change in quality of life for people in either group at 12 months.
For those who had surgery, quality of life went down for a few months afterwards. It then began to improve. At 6 to 12 months it was back to about the same level as before surgery.
There was little change in quality of life in those who had BCG treatment into the bladder.
Side effects
The team looked at the side effects of treatment. They say most of them were mild.
The most common side effects of BCG into the bladder included:
The most common side effects after surgery included:
Conclusion
The research team concluded that it wouldn’t be possible to run a larger trial comparing these treatments.
This study wasn’t designed to work out which treatment worked best. The team say some people are best suited to have surgery and others to have BCG treatment.
The researchers suggest their findings are used to tell people about the risks of each treatment. The researchers hope these findings will help doctors decide the best treatment for each person based on their individual risk.
All trial results help doctors and researchers understand more about different cancers and the best way to treat them.
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 () 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.
Please note: In order to join a trial you will need to discuss it with your doctor, unless otherwise specified.
Professor James Catto
Clinical Trials Research Unit (CTRU)
Sheffield Teaching Hospitals NHS Foundation Trust
University of Sheffield
University of Leeds
Yorkshire Cancer Research - YCR
Freephone 0808 800 4040
“I think it’s really important that people keep signing up to these type of trials to push research forward.”