My dog developed a lump overnight and a needle biopsy revealed cells with multiple nuclei, which the vet said is a marker for cancer and the lump should be removed. By the date of surgery, the lump was significantly reduced, but removal was still recommended. Test results have come back with no cancer, and they have no real explanation for the irregular cells other than a unknown, foreign object may have caused a localized reaction. Am now sick that I subjected my dog to unnecessary surgery, but once they said possible cancer, I felt I had no choice. Has this happened to anyone else?!