The electrode was positioned in the mass under ultrasonographic guidance from the non-recumbent chest side in a fashion like a routine percutaneous biopsyThe electrode was inserted in the point of contact or in the point of the shorted distance between the mass and the internal thoracic surface Once, inside ten atraumatic-umbrella like tine were deployed creating a spherical ablation volume At this point the monopolar radiofrequency electrode was activated, resulting in a transfer of electrical current from the tine to the surrounding tissue, Leading to coagulation necrosis of the neoplastic tissue.