WTF! I have a wart on my hand in almost exactly the same spot as I had one a few months ago. Looks like another trip to the dermatologist.
i had one for like 2 years. one day it just started to heal itself after months of freezing treatments doing nothing. Best to get rid of it while it's small though (i freeze and cut at home). I bet you had like one solitary root left there or something.