You've been told wrong.
I'm sure that Christine, this site's founder, would be more than happy to fill you in on both treatments. She has survived brain mets and is an expert on the subject. You can e-mail directly at
Christine@HER2support.org. You also might want to go to this site's home page/Metastatic Brain Tumors/Tests and Treatments. There you'll find information on both treatments. Best of luck in your hunt for the best treatment.
Love and healing light,
Lisa