Cryosurgery destroys lesions using which type of treatment?

• A. Cold treatment
• B. Heat therapy
• C. Surgical excision
• D. Radiation therapy

Answer: (A)

Cryosurgery destroys lesions using extreme cold. By applying very low temperatures (often with liquid nitrogen), the tissue rapidly freezes, forming ice crystals inside cells and damaging cell membranes and small blood vessels. This leads to cell death and tissue destruction of the targeted area while sparing surrounding tissue to a limited extent. This mechanism is what defines it as cold treatment. Other options rely on heat therapy, surgical cutting, or radiation, which are different approaches and not what cryosurgery uses.