Research in North America and Australia has shown that people with a history of multiple nonmelanoma skin cancers (NMSCs) are at a higher risk of developing new NMSCs than the general population. In North America, it was found that up to 50% of patients with NMSC developed a new NMSC within 5 years.1 The percentage was higher in Australia, where 2 prospective studies found that 50% of women and 70% of men develop new NMSCs within 5 years.2,3 The main risk factors for new skin cancer formation were the number of skin cancers removed and male sex.1- 3 In Australia, it was found that all patients who had 3 or more skin cancers (multiple skin cancers) developed another skin cancer within 6 years; however, it was uncertain whether the rate of development of new skin cancers decreased over time. We report the rate of new NMSC formation in high-risk patients who were followed up for 10 years.
Czarnecki C, Czarnecki D. Patients Who Have Multiple Skin Cancers Develop New Skin Cancers at a Constant Rate. Arch Dermatol. 2002;138(1):125. doi:10.1001/archderm.138.1.125