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Abstract #2137

Growth patterns of non-enhancing glioma assessed on DTI-derived isotropic and anisotropic maps are not associated with IDH and 1p19q codeletion status

Renske Gahrmann1, J.K.H. Spoor2, MMJ Wijnenga3, S Leenstra2, AJPE Vincent2, M de Groot4, PJ French3, MJ van den Bent3, and M Smits1

1Radiology and Nuclear Medicine, Erasmus MC, University Medical Center, Rotterdam, Netherlands, 2Neurosurgery, Erasmus MC, University Medical Center, Rotterdam, Netherlands, 3The Brain Tumor Center, Erasmus MC, University Medical Center, Rotterdam, Netherlands, 4Medical Informatics, Erasmus MC, University Medical Center, Rotterdam, Netherlands

Previous reports show that IDH-mutation status can be determined in glioblastoma using DTI-derived isotropic (p) and anisotropic (q) maps to measure infiltrative growth along white matter tracts by determining the extent or pattern of p/q mismatch: abnormal p overlaps normal q-areas by >0.5cm. We use this method in presumed low-grade (i.e. non-enhancing) gliomas to see if infiltrative growth patterns correlate with IDH-mutation and 1p19q codeletion status, which in turn are correlated with prognosis.

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