This freezes the tumour helping destroy the cancer cells. This can be used in combination with surgical excision, or on its own if surgery is not an option. Cryotherapy can is usually done the operating theatre under local or general anaesthetic. Treatment lasts several minutes. Although helping prevent tumour growth, no samples are sent to the lab so confirmation of tumour death is not always possible. If this is the case, we will monitor you carefully in the clinic. Sometimes we have to repeat this treatment more than once.