Front Paw Pad Has Growth

I have an older cat, about 12 years old, that I noticed today has a growth on one of his front paw central (or large) pad. It appears to be old and well worn. It is growing from the side of the pad and is about a half-inch, or about 12mm, in length. Again, it appears like something that has been there for a while and is not bloody or raw, but is hard and rough as you would imagine something in the location to be.

Anyone think this is a reason for concern? He is not limping or in any way displaying discomfort.

Thanks from,
AL, Icebox, Creampuff and Sox