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Fig. 3A —52-year-old man with recurrent anaplastic ependymoma (World Health Organization grade III). On unenhanced T1-weighted images (top row), intratumoral hemorrhage is present in frontal white matter (white arrow). Lesion appears larger with gadolinium (Gd)-enhanced than with ultrasmall superparamagnetic iron oxides (USPIO)-enhanced (white arrowheads) images. On T2^*-weighted images (bottom row), enhancement is focused in central parts of lesion. Sulcal veins and anterior cerebral artery are particularly well delineated on T2^*-weighted USPIO image (bottom right).