moles can occur anywhere on the body even where the sun never shines. so everywhere needs to be checked. most moles or skin cancers or precancers typically appear in sun exposed areas but not always. we have seen moles on the soles of the feet and the palms of the hands that we have had to watch or remove. so everywhere really needs to be checked on a regular basis.
are moles in an area that isn't exposed to sun is it common that you will find that they are precancerous?