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Figure 3: Sagittal T1-weighted (a), coronal contrast-enhanced (b) and sagittal contrast-enhanced (c) images of a group-3 patient. The lesion is hypointense on T1-weighted images and hyperintense on T2-weighted images. It is ring enhancing in contrast films. The histopathological diagnosis was OCHG (pilocytic astrocytoma)

Figure 3: Sagittal T1-weighted (a), coronal contrast-enhanced (b) and sagittal contrast-enhanced (c) images of a group-3 patient. The lesion is hypointense on T1-weighted images and hyperintense on T2-weighted images. It is ring enhancing in contrast films. The histopathological diagnosis was OCHG (pilocytic astrocytoma)