Cryosurgery uses which type of treatment?

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

Answer: (B)

Cryosurgery relies on using extreme cold to destroy abnormal tissue. By applying very low temperatures with agents like liquid nitrogen, the tissue freezes quickly, forming ice crystals that damage cell membranes and proteins and disrupt blood vessels, leading to cell death. As the tissue thaws, further injury occurs from osmotic shifts and reduced blood flow. This cold-based method is different from heat-based treatments that burn or coagulate tissue, radiation therapy that uses ionizing radiation to damage DNA, or surgical removal that physically excises tissue.