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Figure 3: Left intraventricular central neurocytoma in 23-year-old left-handed 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). Preoperative plan included Wada testing and possible craniotomy with mapping. Dominant expressive speech area is shown in left middle and inferior frontal gyri (yellow arrows) and is anterolateral to lateral ventricular component of lesion. Left superior and middle temporal gyral activation (green arrows) is consistent with dominant receptive speech area and is anterior and inferolateral to left atrial component of lesion. Imaging results confirmed left dominant speech; Wada testing was avoided. Lesion was resected during craniotomy with general anesthesia by using right paramedian approach. No postoperative neurologic deficits were documented.
