<prompt> All of the following modalities can be used for in situ ablation of liver secondaries, exceptUltrasonic wavesAlcoholRadio frequencyCyrotherapy  <response>: Local in situ ablative therapies for liver secondaries Cryotherapy - in situ destruction of tissues by freeze-thaw process. Radio frequency ablation - a probe inseed into the middle of the tumor emits radiofrequency waves from its tip, which heats the surrounding tissue, resulting in coagulative necrosis. Percutaneous ethanol injection Trans catheter chemoembolization Ref : Devitas Cancer: Principles Practice, 7e, p 2362 