Hi Wendy, try not to worry too much,i understand much easier said than done though HUh ? We have a mixed breed dog thats a cross between a golden and a cocker spaniel ( she looks like a smallish golden w/ cocker features on her face )a couple of years ago she had to have some growths and cycsts also removed and no cancer she is fine ,the Vet told us that in some breeds this is not an uncommon thing so hope for the best that that is what it is ,also not sure but i would think if it is cancer he would have other symptoms as well,so keep positive thoughts!,Give your baby a hug from me!
Mrsscififanec