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FIG 3. Images from the case of an 11-year-old boy with a germ cell tumor.
A, Axial contrast-enhanced T1-weighted MR image obtained before treatment. Edema-like change along the optic tract is visible bilaterally (arrows). Arrowhead indicates slightly hyperintense mass.
B, Coronal contrast-enhanced T1-weighted MR image obtained before treatment. Round and almost high signal mass (arrowhead) is visible at the suprasellar region. Edema-like change along the optic tract is visible on the right side of the brain (left side of the figure) (arrow).
C, Axial heavily T2-weighted MR image obtained before treatment. Large arrows, small arrows, and arrowheadindicate edema-like changes, Virchow-Robin spaces, and tumor, respectively. Findings concur with those in D.
D, Coronal heavily T2-weighted MR image obtained before treatment. Edema-like changes (large arrows), more prominent on the right side of the brain (left side of the figure), are visible along the optic tracts. Tumor (arrowhead) is visible. Large Virchow-Robin spaces associated with anterior perforated substance are visible.
E, Axial heavily T2-weighted MR image obtained 2 months after treatment (at level similar to that shown in C). Large Virchow-Robin spaces associated with anterior perforated substance (small arrows) are visible.
F, Coronal heavily T2-weighted MR image obtained 2 months after treatment (at level similar to that shown in D). Edema-like change has disappeared bilaterally, although the tumor (arrowhead) remains in the third ventricle. Normally present large Virchow-Robin spaces (large arrows) are visible. The optic tracts (small arrows) are also visible. Large arrows and arrowhead indicate Virchow-Robin spaces and tumor, respectively.
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