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Images from over 500 patients with glioblastoma were used to build location atlases corresponding to genetic and biologic abnormalities as well as prognosis based on age. Most glioblastomas grew into the periventricular regions adjacent to the subventricular zone. MGMT promoter methylated tumors occurred more frequently in the left temporal lobe in young patients, in IDH1 mutant tumors, in those having the proneural gene expression subtype, and in tumors lacking loss of PTEN that occurred most frequently in the frontal lobe. MGMT methylated tumors with IDH1 mutation tended to occur in the left frontal lobe. EGFR amplified and EGFR variant 3-expressing tumors were found most frequently in the left temporal lobe. Tumors in the left temporal lobe were associated with favorable response to radiochemotherapy and increased survival.

These authors investigated the relationship between amyloid-β, phosphorylated tau, and apolipoprotein E in preclinical Alzheimer disease in 170 patients and controls who had serial imaging up to 3.5 years after the initial study. Global volumes as well as volumes in brain regions known to be involved in the chronic stages of the disease were assessed. Their results led them to propose that atrophy rates are primarily influenced by apolipoprotein E via amyloid-β mechanisms and that amyloid-β -associated neurodegeneration occurs only in the presence of phosphorylated tau.