Principles of cryosurgery.

Area of Science:

• Cryobiology
• Surgical Oncology

Background:

• Cellular destruction by cryogens is complex.
• Cryoinjury initiation involves iceball formation and thermogradients.

Purpose of the Study:

• To elucidate the mechanism of cryoinjury.
• To discuss histological and clinical aspects of cryosurgery.

Main Methods:

• Analysis of cryogen-induced cell damage mechanisms.
• Review of cryosurgery principles, including freeze-thaw cycles.

Main Results:

• Rapid freezing causes damaging intracellular ice.
• Slow thawing and multiple freeze-thaw cycles enhance necrosis.
• Thermogradients are proportional to distance from the application point.

Conclusions:

• Understanding cryoinjury mechanisms is key for effective cryosurgery.
• Optimal cryosurgery involves specific freeze-thaw protocols.
• Histological, clinical, and complication aspects require careful consideration.