Californian Traci French thought she had only a stubborn pimple, but the unsuspecting stain turned out to be more alarming.
The stain appeared for the first time five years ago, but always returned.
"It was very flaky, it looked like dry skin," French told NBC's Today Show.
"It would turn a bit red and then it would look like a pimple is about to start. Then it would disappear and the dryness reappear.
The 50-year-old was worried and decided to visit her dermatologist at an annual skin examination. To consult Shirley Chi.
"Normally, I know immediately that it is skin cancer. But in this case, it just looked like a pimple, "said Dr. Chi. "It looked like a skin-colored bump."
French should wait a few months to see if she would disappear. A few months later, when the stain did not disappear, Dr. Shaver shaved. Chi a sample off.
The stain was found to be squamous cell carcinoma, a common form of non-melanoma skin cancer.
] Squamous cell carcinoma is reported to be common, especially on sun-rich parts of the body.
The French woman, who actively practiced sports in her youth, such as football and softball, said she used sunscreen but did not always face it.
Squamous cell carcinoma accounts for approximately 30 percent of all non-melanoma skin cancers, according to the Cancer Council Australia.
Symptoms include thickened red, scaly patches, fast-growing lumps that look like sore and none have healed, and the stain may be sensitive to touch.
The recommendation to prevent non-melanoma skin cancer is to minimize exposure to the sun, wear SPF 30+, wear hats, sunscreen, and tight-fitting sunglasses.
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