Woman There were four stones and discovered a ball on her chest, hidden from layers.
Jan Oliver, who was a size 20, says his dramatic loss of loss – from 14th to 9th 10th – helped save his life.
The florist, 60, from Herefordshire revealed that she used to consume more than 3,000 calories a day.
She grabbed on the pounds after engaging in grapes and biscuits, and chopped on cheese and biscuits every night.
Jan decided to continue a diet after being horrified with photos of herself after a weekend off with friends.
After joining Slimming World in 2016, she lost two stones in three months.
However, one morning in the shower she noticed a glass size on her right breast.
When she went to the doctors, she was diagnosed with cancer.
She said: "The tumor was for a long time, but I never realized, since it was under layers.
"As soon as I lost my weight, it was visible. I strongly believe that if I did not last a diet, I would not be here today."
Jan suffered chemotherapy and had an operation to eliminate the tumor cancer.
Because she is totally clear, she has fallen below the 10th and now is size 10.
From her past lifestyle, she added: "I ate only a whole amount of cooking and cooking pieces and I would have cream in every meal.
"I would eat a whole cheese block at the same time but after a diet I lost weight really quickly."
At the moment when she found the blow, Jan explained: "When I started to lose weight I found a mask in my right chest, it was huge for grape, but it did not hurt.
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"I went to the doctors and it turned out to be a very aggressive breast tumor.
"The oncologist said," If you did not lose weight, you might not have lived because it was hidden in fat deposits – the heavy loss saved my life. "" I had a light bulb in December 2016 to get rid of the tumor, but I did not have a restructuring surgery because that's what it is.
"I had to have extensive radiation therapy from January to March 2017 and I will be a doctor for the next five years."
At the beginning of today, we told you how cancer cancer survived after she had chosen almost certain death when she decided not to abort her baby when the cruel condition had returned during her pregnancy.