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Liquid nitrogen

Liquid nitrogen is a chemical that is super cold, about -200 degrees Celsius.

Liquid nitrogen will instantly freeze anything it touches. It is used to kill cells that make up diseased or cancerous tissue. Tissue that has been frozen dries out and falls off.

References

Habif TP. Dermatologic surgical procedures. In: Habif TP, ed.Clinical Dermatology

Update Date 10/14/2012