Oscillating magnetic fields effective

If I had brain cancer I'd use oscillating magnetic field therapy to fight it. It's already proven itself against skin tumors so why not brain tumors? Granted, the farther away from the magnetic source the weaker the magnetism. But anything is better than nothing, which is what the medical community offers (nothing that is effective). What do I mean by oscillating you may ask? It means that the field direction (north/south pole) changes back and forth at its oscillatory rate. There's already been a scientific study proving its worth against tumors and if you message me I can share that with you.