Fig. 2.
Kaplan-Meier progression-free survival curves comparing patients receiving base of skull radiation therapy with those treated by craniospinal or whole brain radiation therapy among all patients (a) and stratified by bone marrow status (b). BM = bone marrow; BOS = base of skull radiation therapy; CNS = central nervous system; CSI = craniospinal radiation therapy; WBRT = whole brain radiation therapy.