For primary brain tumors, surgery is generally the treatment of choice, though the benefits for patients with a glioblastoma may be small (go here).
For patients with brain
metastases, surgery may be an option if there is only one lesion and
no active cancer elsewhere in the body (go
here and
here).
Radiosurgery is used to describe high dose radiation given in one
treatment and does not involve any conventional surgery (go
here and
here).