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Figure 6: Right parietal lobe anaplastic oligodendroglioma in 23-year-old woman. Transverse functional MR images derived from series of T2*-weighted echo-planar MR images (2000/40, 24 x 24-cm field of view, 64 x 64 matrix, 5-mm section thickness, no intersection gap) are displayed as thresholded activation maps overlaid in red and yellow on a set of coplanar transverse T2-weighted fast spin-echo MR images (3000/84, 24 x 24-cm field of view, 256 x 192 matrix, 5-mm section thickness, no intersection gap, echo train length of eight). Resection and craniotomy with mapping were initially planned. Left-hand sensory motor area (yellow-red regions) is adjacent to anterior margin of superior portion of lesion in right parietal lobe. Bilateral sensory motor areas (white arrows) are shown, and activation is seen in supplementary motor cortex (yellow arrows). Because patient experienced left hemiplegia and because functional motor area was intimately involved with lesion, treatment plan was changed to biopsy. No postoperative neurologic deficits were documented.
