1naresh
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Tumor Type WHO Grade Average Minimum ADC × 10−3 mm2/s ADC Ratio Thalamus ADC Ratio White Matter Desmoplastic infantile ganglioglioma I 1.63 1.68 1.50 Desmoplastic infantile ganglioglioma I 0.88 1.05 0.79 Desmoplastic infantile ganglioglioma I 0.97 1.08 0.80 Desmoplastic infantile ganglioglioma I 1.14 0.87 0.76 Choroid plexus papilloma I 1.01 1.05 1.10 Choroid plexus papilloma I 0.92 1.16 0.79 Choroid plexus papilloma I 1.31 1.53 1.23 Pilocytic astrocytoma I 0.78 0.96 0.75 Astrocytoma, focal II 1.71 1.50 1.35 Pilomyxoid astrocytoma II 1.03 1.06 0.71 Astrocytoma, diffuse II 1.12 1.27 0.98 Anaplastic ependymoma III 0.69 0.82 0.59 Anaplastic ependymoma with tanycytic features III 0.54 0.57 0.47 Choroid plexus carcinoma III 1.27 0.93 0.90 Atypical teratoid/rhabdoid tumor IV 0.67 0.53 0.41 Atypical teratoid/rhabdoid tumor IV 0.40 0.55 0.42 Poorly differentiated carcinoma IV 0.56 0.45 0.32 Poorly differentiated carcinoma IV 0.40 0.51 0.35 Glioblastoma IV 0.58 0.62 0.41 P value, t test between low- and high-grade groups .0018 <.0001 .00042
Note:—All 3 parameters were significant between the difference of the means of the low-grade and high-grade groups. Of note, the choroid plexus carcinoma in our study is an outlier in the high-grade group.