A study to find out more about borderline ovarian tumours

Cancer type:

Ovarian cancer





This study looked at borderline ovarian tumours and how to improve management.

It was open for people to join between 2010 and 2017. The team looked at the results in 2022.

More about this trial

Borderline ovarian tumours are not cancers. They are abnormal cells that may become cancer. They develop in the ovary but don’t go into the surrounding tissue and rarely spread.

In this study doctors gathered clinical information, tissue samples and data from follow up visits over many years. 

They hoped to predict likely disease outcome (prognosis) for individual women. They wanted to find out if this information could help them to work out what the best management was for an individual.
So in future doctors can have management plans to better suit individual women. They also wanted to develop ways to prevent the disease progression, or to treat it better.

Summary of results

The team found that some factors had a strong influence on whether these tumours came back. 

Study design
The average age of the women taking part was 60 years of age. The team looked at:

They also looked at the samples of tissue from when the women had surgery to remove their tumour. 

They found that the tumour was more likely to come back if:

  • there are areas of abnormal cells outside of the ovaries such as in the tummy (abdominal) area
  • the tumour was a serous type
  • it was a higher stage of disease – all of those who developed a recurrence had stage 3 disease at the time of their diagnosis

They also found that the levels of CA-125 in the blood started to increase in everyone whose cancer came back. 

They say that this study highlights the importance of follow up. In particular the importance of checking the levels of CA-125.  

Where this information comes from    
We have based this summary on the information from the study team. 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 Mona El-Bahrawy

Supported by

Experimental Cancer Medicine Centre (ECMC)
Imperial College London

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.

Wendy took part in a new trial studying the possible side effect of hearing loss

A picture of Wendy

"I was delighted to take part in a clinical trial as it has the potential to really help others in the future.”

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