Cryosurgery Kit - Verruca Freeze 50 Freeze Kit (VFK50)A Cryosurgery Kit like the Verruca Freeze 50 (VFK50) is essentially a portable dermatocryotherapy system used to remove warts and similar skin lesions by freezing them. In practice it is a handheld, pressurized canister of refrigerated gas (a proprietary cryogen) that a clinician sprays onto the lesion. The extreme cold (about 70 C, or 94 F) destroys the targeted tissue. CryoSurgery Inc the maker of Verruca Freeze explains that their kits are