PMC5586848_01
Case 1: DTI-based fiber-tracking displays a reduced and partially interrupted fiber tract (arrow) on the left CST.
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F1
DTI-based fiber-tracking displayed a reduced fiber tract on the left CST, and partially interrupted in the lesion area (fig. 1). Fiber bundles slightly increased but were still interrupted using an FA cut-off value of 0.10 for fiber-tracking. Diagnosis of diffuse astrocytoma was made after biopsy and histopathological results.
PMC5586848_02
Case 2: fiber-tracking displays interrupted fibers (arrow) distal to the right CST.
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F2
FA (0.08-0.22) compared to the contralateral whiter matter (0.40). Fibers displayed interruption distally to the right CST (fig. 2) and did not significantly improve using an FA cut-off value of 0.10 for fiber-tracking.
PMC5586848_03
Case 3. a DTI-based fiber-tracking displays a CST passing through the lesion (arrow) without interruption. b T2-weighted imaging shows lesions involving part of the precentral gyrus (arrowhead). MRS reveals a high choline concentration within the lesion.
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F3
DTI-based fiber-tracking displayed a right CST passing through the lesion without interruption (fig. 3).