I had a weird 'growth' on my finger a few years back, after scratching it in the garden. Docs insisted it couldn't be a reaction to a scratch or bite and must have been a viral wart, however I suspect it was more fungal in origin. They tried freezing it 3 or 4 times to no avail, then referred me to a dermatologist who rubbed acid into it for several weeks, likewise with no effect at all. The weirdest thing was the speed at which it grew back after being frozen/burnt, the scab would come off and 2 or 3 days later it would be full-size again (5mm thick, right on the end joint, and VERY painful)
After a chance comment from a colleague at work, I took to wrapping it with electrical insulation tape - after less than a week it had halved in size, and after 2 more weeks it had totally gone. Still got a scar & a numb patch on my finger.