Confidential data obtained by Granada Reports shows 12 cases of cancer were missed by one radiologist at the Royal Lancaster Infirmary prior to 2011.
Two women have since died and and the Trust which runs the hospital says although the deaths can't be directly linked they can't rule out that women may have come to harm as a result of not being diagnosed at the first opportunity.
All the data has now been released by Public Health England and comes just months after a damning report into mother and baby deaths at the same Hospital Trust.
Our correspondent Amy Welch reports.
Many patients across the North West who go to their doctor with symptoms of cancer, are going far too late. Cancer Research UK says forty thousand people here are diagnosed each year.
Yet only just over half of them are catching the disease early enough. The charity's unveiled a disturbing TV ad urging people not to ignore lumps under their skin. Victoria Grimes has met someone who understands that all too well.
40,000 people a year are diagnosed with Cancer in the north West, a specialist tells us why we should't be afraid of getting diagnosed:Read the full story ›
Nearly 40,000 people are diagnosed with Cancer in the north West every year.
Early diagnosis in the region is lower than the average for England, with only 52% diagnosed early compared with 54% in the rest of the country.
Cancer Research UK is running a month long campaign in March to encourage people to pay attention to lumps and bumps on their bodies.
This promotional video called 'The Lump' is aimed at getting people paying attention to the early signs of Cancer:
A former radiotherapist is backing a new cancer campaign that urges people to watch our for lumps and bumps.
Amy Horridge, who used to work at the hospital where she is now undergoing treatment, is keen to support the message.
She was diagnosed with Hodgkin lymphoma after finding a lump on her neck.
Amy, who worked at the Rosemere Cancer Centre at Royal Preston Hospital, is now looking forward to completing her chemotherapy in time to marry British Aerospace engineer Toby Campbell in August.
I was getting ready to go out one night and just brushed my hand against a lump in my neck, around my left clavicle, about the size of a grape.
I realised something wasn’t right so, even though I felt well, I went to see my GP to get it checked out. He listened to my chest and also felt around my neck. That was when he discovered another, smaller lump on my right clavicle which I hadn’t noticed.
Amy, who now works as a reception class teacher at St Joseph’s Catholic Primary in Preston, said her remaining lumps shrank to around half their size following the first couple of sessions of chemotherapy, and she now cannot feel them at all.
Amy’s sister Elizabeth is also supporting the campaign and will be running Race for Life, a series of 5K, 10K and Pretty Muddy events which raise money for cancer research, at Moor Park in Preston on 24 May.
We used to talk about red lights flashing when I worked as a radiotherapist, and there was definitely one flashing on this occasion. I didn’t feel right in myself.
Early diagnosis is really important. My consultant said I might have had cancer for a while, but I still feel like I caught it early.
He says to me during my fortnightly visits that we are 'going for a cure' which is reassuring as it shows that early diagnosis can change the overall outcome.The main thing now is that I finish my chemotherapy in time for my wedding in August.
Cancer Research is running a month-long campaign in the North West trying to get us to pay more attention to the development of unexpected lumps and bumps on our bodies.
The charity says 40- thousand people in the region are diagnosed with the disease each year.
Early diagnosis of cancer in the North West is lower than the average for England, with only 52 per cent diagnosed early, compared with 54 per cent for the rest of the country
Breast cancer charities say they are extremely disappointed a new drug trialled in Manchester will not be made routinely available on the NHS.
Kadcyla can extend a patient's life by almost six months but costs more than 90 thousand pounds
The health service watchdog says that cannot be justified.
That means women with breast cancer would have to bid through their doctor to get funding for the drug.
Mel Barham reports.
Researchers say a new drug for breast cancer will give patients vital extra time.
The drug called Kadcyla was trialled in Manchester and is now available to patients for the first time.
Doctors say it can extend women's lives by almost six months for those with the most aggressive form of the disease.
Around thirteen hundred women in England could benefit from the drug, which costs £6,000 a month.
Mel Barham reports
A Manchester woman has taken part in a trial of a drug called Kadcyla or TDM-1 a revolutionary treatment for women with breast cancerRead the full story ›
Professor Peter Barrett-Lee is the Medical director at Velindre Cancer Centre. A new drug Kadcyla is available for patients to use today. At the moment it can only be used to prolong the life of suffers in the later stages of breast-cancer.
But Professor Peter Barrett-Lee says in the future, the drug could be further developed 'to cure breast cancer.'