Squamous cell carcinoma (SCC) is the second most common skin cancer and accounts for about 20% of all skin cancer cases in Canada. In numbers, this means that it affects more than 20,000 Canadians every year. SCCs most commonly develop in sun exposed areas, but they can also form in other areas as well.
Presentation can vary, but will frequently resemble a wart-like growth that crusts or occasionally bleeds. They can also appear similar to an open sore. Unlike Basal cell carcinomas, SCCs have a higher chance of metastasizing (spreading) and are considered much more dangerous for this reason. SCCs on the lips (called actinic cheilitis) and the mucous membranes are considered to be especially high risk.