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Figure 2: Magnetic resonance images of the patient. (a) Axial T1-weighted image shows abnormal orientation of sylvian fissures (arrows), which are connected across the midline and nonseparation of posterior frontal and parietal lobes (arrowheads), (b) Axial T2-weighted image at the level of basal ganglia shows normal separation of basal and anterior frontal lobes and occipital lobes. The basal ganglia and thalami are also well separated. The frontal horns are hypoplastic with absent septum pellucidum, (c) Sagittal T2-weighted image shows agenesis of body of corpus callosum (arrows) with normal splenium and genu, (d) Parasagittal T2-weighted image shows vertical orientation of sylvian fi ssure (arrows) and vertical course of middle cerebral artery (arrowhead)

Figure 2: Magnetic resonance images of the patient. (a) Axial T1-weighted image shows abnormal orientation of sylvian fissures (arrows), which are connected across the midline and nonseparation of posterior frontal and parietal lobes (arrowheads), (b) Axial T2-weighted image at the level of basal ganglia shows normal separation of basal and anterior frontal lobes and occipital lobes. The basal ganglia and thalami are also well separated. The frontal horns are hypoplastic with absent septum pellucidum, (c) Sagittal T2-weighted image shows agenesis of body of corpus callosum (arrows) with normal splenium and genu, (d) Parasagittal T2-weighted image shows vertical orientation of sylvian fi ssure (arrows) and vertical course of middle cerebral artery (arrowhead)