Scientists from the National Cancer Institute say that skin lesions larger than 6 millimeters, are more likely to turn into skin cancer than smaller ones. Six millimeters is about a quarter of an inch.
Also people with melanoma on their scalp or neck have a much higher mortality rate. They're nearly twice as likely to die as those who have skin cancer elsewhere.
As a result of this study, researchers want doctors to examine the scalp and neck more carefully when watching for signs of skin cancer.
