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Cryotherapy is a novel endoscopic method of ablating abnormal gastrointestinal (GI) mucosa with cryogens originating from either liquid nitrogen or carbon dioxide gas. The ablation is performed by passing a catheter through the accessory channel of an endoscope and the cryogen is sprayed onto the target tissue in a noncontact manner. Cell death is induced by producing extracellular ice. Recently,...
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