if you have already gone to the vet, i would go back. recently my dog
had a lump
removed from her upper back. i had gone to the vet after i noticed a lump
. It was moveable, and the vet thought it was cancer. i brought her to a specialist who thought it was not cancer, that it was a hemotoma. He told me if it grow, spreads, etc we need to have it tested. we had it tested with a needle, and they found cancer cells.