Claire Warner posted the image to her Facebook account, where she explained that it was just a small dimple that led to her breast cancer diagnosis.
“This is a picture of my left boob,” she wrote.
“The small purplish bruise is where I had a biopsy taken. The minuscule dimple up and to the left of it is a rare and little-known symptom of BREAST CANCER,” she continued.
“Blink and you’d miss it. I hope I’m one of the lucky ones.”
She shared the picture of her breast to raise awareness among her friends and family members, however the post has since gone viral.
““PLEASE PLEASE PLEASE check yourself and get your loved ones to check themselves also,” she wrote.
“If I can help one other person, the way I was helped, then it’s been worth showing my soon-to-be-reduced left tit to the world.”
Warner explained that she had caught her cancer - diagnosed as invasive ductal carcinoma - exceptionally early and, as a result, she will now undergo surgery, chemotherapy and radiotherapy.
She has also created a Twitter account called My Left Boob to update her followers of her diagnosis .