Researchers from the Assistance Publique Hopitaux de Paris have compared the expense of radio-frequency ablation and cryoablation, based on the destruction of one 2- or 3-cm tumor in more than 50 procedures at a Paris hospital. Their findings, presented as a poster at ESGAR 2001, showed both procedures to be more expensive than percutaneous ethanol injection. Costs would fall by 5% to 10% for RF ablation and by 25% to 30% for cryoablation if the annual numbers of each procedure doubled, the researchers said.