A couple of days ago I noticed a lump between Graces shoulder blades.So off to the vet again The vet thinks it may be a fibrosarcoma which is an agressive form of cancer.He says it is rare in dogs, it is caused by an injection.The lump is at the site of her last injection(antibiotic for severed tendon).He says to wait and see if it grows incase it is just a reaction to the injection not a tumor.But I feel that if it was a reaction it would have come up almost straight after the jab not 4 weeks later.I am devastated as Grace is only 4years old next week.The lump is about thumb nail size but I am sure its grown already.I feel that the sooner it is removed the better the chance of survival.Has anyone else ever had this with their dog?I dont normally hesitate but want to do whats best for Grace.She is my little o and im not ready to lose her yet.