Cryosurgery is a type of surgery that does not usually involve cutting tissues to achieve an outcome. It is most commonly used to remove small tumours. If the tumours are very small the procedure may be able to be carried out under local anaesthetic. Larger tumours would still require a general anaesthetic. The technique involves freezing the lump. When the pet goes home the lump is still present but the action of freezing the lump causes it to die and the lump then regresses over a 2 – 3 week period.