Is it necessary to go so far as making a diagnosis at all? Wouldn't it suffice to detect -and alert the user- that some of her moles have changed shape and she might need to have them looked at more carefully by an expert? This is a task that is very difficult to perform with the naked eye, especially for people with skin types that have lots of moles and an automated decision that could be relied on to detect otherwise imperceptible changes, could perhaps even save some lives.