Pam Corrigan discovered her first tumour in 1984 and has since undergone a double mastectomy and countless rounds of chemotherapy and radiotherapy.
She has even had cancer in the scar tissue left by her mastectomy.
Over the past three decades, she has lived through innovations in treatment for the disease and helped pioneer experimental drugs which have since become commonplace.
She has also raised more than £1 million for specialist treatment centres for breast cancer.
Despite various different treatments, including three different drugs, her cancer has repeatedly returned over the decades.
Mrs Corrigan, an accountant who lives in Bristol, is now in remission from her latest bout of the disease last year – and remains stoic and positive about the future.
She said treatment of breast cancer has changed dramatically since the 1980s.
‘When I was first diagnosed no one spoke about it. We would be kept on a general ward,’ she said.
‘There was no such thing as after care, it was more like ‘we have done our job, that’s it.
‘No one was specially trained and although you could tell they wanted to do more for you, they had no training, so they were almost scared they would do something wrong.