Are Natural Therapies Effective In Treating Glioblastoma?

On Dec 26,2014 my friend (67 years old and in excellent condition until now) had an operation to remove a 2.2 cm tumor located in the left parietal area..(speach). The tumor was diagnosed as Glioblastoma. Radiation and chemotherapy was suggested at St. Margaret's Hospital. In reading various articles the prognosis for cure is limited. Are there any natural therapies that would be effective?