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Table 1: MR imaging features and IDH-mutation and 1p/19q codeletion status
IDH Wild- Type IDH-Mutant P IDH-Mutant, Non-1p/19q Codeleted IDH-Mutant, 1p/19q Codeleted P
MR imaging features (No.) (%) 
    T2 signal intensities^{^a} 
        >Gray matter 13 (22.4%) 30 (43.5%) .012^{^c} 21 (48.8%) 9 (34.6%) .248
        >Mixed 45 (77.6%) 39 (56.5%) 22 (51.2%) 17 (65.4%)
T2 homogeneity^{^a} 
    Homogeneous 6 (10.3%) 14 (20.3%) .125 10 (23.3%) 4 (15.4%) .544
    Heterogeneous 52 (89.7%) 55 (79.7%) 33 (76.7%) 22 (84.6%)
Margin 
    Well-defined 32 (54.2%) 27 (38.0%) .065 20 (44.4%) 7 (26.9%) .143
    Mixed 27 (45.8%) 44 (62.0%) 25 (55.6%) 19 (73.1%)
Edema 
    No-to-minimal 20 (33.9%) 57 (79.2%) <.001^{^c} 38 (82.6%) 19 (73.1%) .339
    Mild-to-marked 39 (66.1%) 15 (20.8%) 8 (17.4%) 7 (26.9%)
Enhancing pattern^{^b} 
    None/minimally enhancing 4 (7.0%) 30 (42.3%) <.001^{^c} 19 (41.3%) 11 (44.0%) .826
    Enhancing 55 (93.2%) 41 (56.9%) 27 (58.7%) 14 (56.0%)
Proportion of enhancing area^{^b} 
    <50% 14 (23.7%) 63 (88.7%) <.001^{^c} 40 (87.0%) 23 (92.0%) .704
    ≥50% 45 (76.3%) 8 (11.3%) 6 (13.0%) 2 (8.0%)
Cystic area 
    Presence 5 (8.5%) 28 (39.4%) .013^{^c} 26 (56.5%) 17 (65.4%) .461
    Absence 54 (91.5%) 43 (59.7%) 20 (43.5%) 9 (34.6%)
Necrotic area^{^b} 
    Presence 49 (83.1%) 16 (22.5%) <.001^{^c} 38 (82.6%) 17 (68.0%) .159
    Absence 10 (16.9%) 55 (77.5%) 8 (17.4%) 8 (32.0%)
rADC_mean (median) 1.1 1.6 <.001^{^c} 1.7 1.5 .071
rADC_min (median) 0.9 1.4 <.001^{^c} 1.4 1.3 .178
rADC_max (median) 1.3 1.8 <.001^{^c} 1.9 1.7 .106
↵a There were 4 cases lacking T2 MR images.
↵b One case in the IDH-mutant group lacked postcontrast studies.
↵c Statistically significant (P < .05).