Every melanoma case is different. It is grouped into the term melanoma but can differ based on the location in the skin, the amount of damage, the patients age and a variety of other factors. In the future we might be able to define melanoma’s based on other factors, like genetic mutations.
Melanoma is most often categorised into four different types:
Three of these types are in situ, which means that they are located on the top of the skin and are mostly not invasive from the start. However, this can change with time. The fourth type is invasive from the start as they are located deeper in the skin, making it much more dangerous than the others.