Thank you all so much. I have been googling my head off. There are some similar pictures, and the hyperkeratosis is one. Thing is, this growth isn’t “hard”, it’s very soft. There are also pics of skin cancer tumors, and these look similar too. The growth itself doesn’t seem to bother him, rather it’s The inflammation surrounding that is tender. He lets me treat it though. And look - over the last two days, two of the “fronds” (?) have fallen off!! No idea where they went... in the snow? In the house?!!! Maybe it’s warts....???? So odd. I just don’t know.