MRI Atlas of IDH-Wildtype Supratentorial Glioblastoma: Probabilistic Maps of Phenotype, Management, and Outcomes A 3D atlas of glioblastoma location was developed from a database of 392 adults with isocitrate dehydrogenase (IDH) wild-type supratentorial glioblastomas. Superficial tumor location was associated with preserved functional status at diagnosis (11% of patients; P < .05), large surgical resection (44% of patients; P < .05), and prolonged survival (49% of patients; P < .05). Deep tumor location was associated with impaired functional status at diagnosis (11% of patients; P < .05), neurologic deficit (72% of patients; P < .05), surgical treatment limited to a biopsy (47% of patients; P < .05), and shortened survival (51% of patients; P < .05). The color frequency map illustrates the location and the number of patients with IDH-wildtype glioblastoma. Roux A et al. Published Online: October 8, 2019 https://doi.org/10.1148/radiol.2019190491