Q. What is a Grey's tumor? My sheltie has one at the top of front leg. It has been aspirated and vet is not concerned for the moment.
DAVID ELBEZE, DVM, MRCVS
A. the color of the tumor is not always very helpful when trying to determine which kind of tumor it is. one of the most dangerous tumor called "mast cell" tumor can be grey in some cases and it is a malignant tumor that needs to be removed. If you are uncertain of the first diagnosis you can always ask your vet to send the FNA (aspiration) to the lab, there is a better chance that they would be able to give you an accurate answer.
A. If pathology has determined the mass is benign, monitor it for rapid change. Have it resected if it causes pain or impedes movement. I can find no mention of a "Grey's tumor" in the literature. I will do some research and reply to this question again if I find new information.