Are actinic keratoses deadly?
AKs have the potential to progress into squamous cell carcinoma, the second-leading cause of skin cancer deaths in the United States. At least 40 percent of all squamous cell carcinomas begin as AKs. If caught early, AKs are treatable. But if they progress to squamous cell carcinoma and are left untreated, the cancer can grow and metastasize (spread to other organs), which can be deadly.