What is a cryosurgery?

What is a cryosurgery?It is the technique of using extreme rapid cooling to freeze tissues, thereby destroy them. Rapid cooling to temperature below freezing point produces irreversible cell damage and cell death occurs at -20 to -90 degree Celsius. Freezing produces white areas of necrosis. It is applied in the treatment of malignancies, vascular tumours and aggressive tumours.

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