My older cat...11 years.. has an extra growth on the top of one of his toes. It's pink. and about pea sized( or slightly smaller). It doesn't appear to bother him, and does not appear to be increasing in size. I am not too worried about it...but worried enough to just post this question to you....ps....my cat is a BIG boy...always has been....I have a feeling it may be just a lipoma or something similar.
Lipomas are unusual in cats. I would have the growth checked by your local vet to be on the safe side. Your right, it could be benign but I would not take any chances. vetcare