I just watched the video by dr. beck and the magnetic pulsar is typically used to destroy viruses, fungi, bacteria, and whatnot in the lymphatic system. However I guess it could be used to break up a tumor... my understanding is that the emf wave creates currents within the fluids that will kill pathogens but leave the body alone. So if cancer is a pathogen, which to my understanding is anything that is acidic... and low oxygen, then it should get killed.