NOA-06-Trial (prospective randomized phase 3 trial for solitary/singular brain metastases: Surgery versus surgery plus whole brain irradiation) NOA-06-Trial (prospective randomized phase 3 trial for solitary/singular brain metastases: Surgery versus surgery plus whole brain irradiation) Previous Study NOA-05-Trial (single-arm phase 2 study of PC chemotherapy in patients with gliomatosis cerebri) Next Study NOA-07-Trial (multicenter pilot study on the treatment of adult medulloblastoma)