Hi, my mother had breast cancer. A year and a half ago she had a successful lumpectomy. And the dr. advised she have radiation treatments to further make sure that it was good to clean up any possible bad cells that might still remain. 33 treatments of external radiation. Now a year later she hurt @ her breast bone and breast that was treated. she also spit up a lot of foaming softer flam. She visited her general PR actioner dr. He thought it could be poisoning from the radiation treatment ? Any suggestions would be appreciated. THANK YOU !!