 The biopsy will show the presence of a sarcoma, but information like location and the presence of inflammation or necrosis will increase the suspicion of VAS.It is possible for cats to have a granuloma form after vaccination, so it is important to differentiate between the two before radical surgery is performed.One guideline for biopsy is if a growth is present three months after surgery, if a growth is greater than two centimeters, or if a growth is becoming larger one month after vaccination.