Did your Dr call it a ( can't spell it so will phonetic spell it) a sebashus! wart. I have loads of these and they look a bit like a wart but are flattish and flaky sometimes the top peels off totally and leaves pink wart underneath. They are harmless and are not caused by wart virus but they call them that for some reason. Also called age spots you see loads of old people with big brown patches on their face and hands.