Statistics and outlook for ovarian cancer

• A quick guide to what's on this page
• What you need to know about the information on this page
• General cancer statistics
• Overall statistics and by stage
• Other factors affecting outcome
• How reliable are these statistics?
• Clinical trials

On this page there is quite detailed information about the survival rates of different stages of ovarian cancer. We have included it because people ask us for this. But not everyone who is diagnosed with a cancer wants to read this type of information. If you are not sure whether you want to know at the moment, you might like to skip this page for now. You can always come back to it.

The statistics on this page are 'relative' survival figures. This means that they don't include people with ovarian cancer who have died from other causes. Cancer statistics are often worked out this way because it gives a more accurate picture of the survival rate of the cancer. Many people with cancer are older and may not die from their cancer, but from other illnesses, such as heart disease.

Please note - No UK statistics are available for different stages of cancer or treatments that people may have had. The statistics we present here are pulled together from a variety of different sources, including the opinions and experience of the experts who check each section of CancerHelp UK. We give statistics because people ask us for them. But they are only intended as a general guide and can't tell you what will happen in your individual case.

Unless you are very familiar with medical statistics, you may find it helpful to go to our section about different types of cancer statistics before you read the information below.

Remember - statistics are averages based on large numbers of patients. They cannot predict exactly what will happen to you. No two patients are exactly alike and how well treatment works also varies from one person to another. You should feel free to ask your doctor about your prognosis, but not even your doctor can tell you for sure what will happen.

You may hear doctors use the term ‘5 year survival’. This does not mean you will only live 5 years. It relates to the proportion of people who are alive 5 years after diagnosis. Doctors follow what happens to people for at least 5 years after treatment in any research study. This is because there is only a small chance of the cancer coming back more than 5 years after treatment. Doctors do not like to say these people are cured because there is that small chance. So they use the term ‘5 year survival’ instead.

As with many other types of cancer, the outcome depends on the stage of your cancer when it is diagnosed, in other words, whether it is an early or advanced cancer.

Of all the women diagnosed with cancer of the ovary in England and Wales, 36 out of 100 (36%) will live for at least 5 years after diagnosis. There is information below about the likely outcome for the different stages of ovarian cancer.

The stage of the cancer when it is diagnosed is the most important factor in predicting survival.

Figures that are available suggest that in women with early stage ovarian cancer, more than 7 out of 10 (73%) will live for more than 5 years. This is a general figure and individual situations do vary. 5 year survival rates may drop below this level for some women who have a poorer outlook because of general ill health, their age or the type of tumour they have.

In women whose ovarian cancer has spread into tissues close to the ovary more than 3 out of 10 (34%) will live for more than 5 years.

In women whose cancer has spread into lymph nodes close to the tumour, more than a quarter (27%) will live for more than 5 years.

In women whose cancer has spread to other parts of the body (metastatic cancer), between 5 to 33 out of 100 women (5 to 33%) will live for more than 5 years. The statistics for stage 4 vary quite a bit between reports. This is because this stage covers a lot of different situations. It means the cancer has spread, but it has different effects depending on which type of ovarian cancer it is and which part part of the body it has spread to.

There are other factors that can affect your prognosis, apart from the stage of your cancer. These include

• The grade - how abnormal the cancer cells look
• Your age - younger women tend to live longer
• Whether all the tumour can be removed during initial surgery
• Your overall health

Doctors have a way of grading how well you are. They call this your ‘performance status’. You may see this written as PS. A score of 0 means you are completely able to look after yourself. A score of 1 means you can do most things for yourself, but need some help. The scores continue to go up to 4, depending on how much help you need. This affects the outcome of cancer because overall, the fitter people are, the better able they are to cope with their cancer and treatment.

No statistics can tell you what will happen to you. Your cancer is unique. For example, the same type of cancer can grow at different rates in different people. The statistics are not detailed enough to tell you about the different treatments people may have had. And how that treatment may have affected their outlook. Many individual factors will affect your treatment and prognosis.

Taking part in clinical trials has been shown to improve outlook. No one is completely sure why this is. It is probably partly to do with having a closer eye kept on you by your doctors than you might if not in a trial - for example, more scans and blood tests. There is more about clinical trials on the ovarian cancer research page.