PMC3279989_01
Magnetic resonance imaging revealing a solitary mass lesion in the intraparenchymal region near the ventricular trigone. The mass of high intensity appears on both T2-weighted images (WI) and diffusion-WI (a and d), and that of low intensity on T1-WI (b). Axial, sagittal, and coronal views on T1-WI with gadolinium demonstrate homogenous enhancement of the mass lesion (c, e, and f). The left thalamus and the parietal lobe near the lesion have atrophic changes
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Magnetic resonance (MR) imaging revealed an intraparenchymal mass lesion near the left ventricular trigone [Figure 1].
Navigation-guided endoscopic biopsy performed for the differential diagnosis. (a) A transparent sheath of diameter of 10 mm (Neuroport ; Olympus Corp.) with a removable inner tube, inserted into the front of the target lesion via the burr hole under the control of the navigation system. (b) Endoscopic view using rigid endoscope (EndoArm) shows the tumor tissue (arrow heads) near the ventricle wall (arrow)
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A transparent sheath was inserted into the front of the target lesion via the burr hole under the control of the navigation system (StealthStation ; Medtronic, Inc., Minneapolis, MN, USA) [Figure 2].
Axial views on T1-weighted images (WI) with gadolinium and T2-WI after the initial cycle of chemotherapy showing that the enhanced mass has disappeared (a and d). Follow-up MR images at 5 months (b and e) and 1 year (c and f) after the surgery show no evidence of recurrence. T2-WI (f) 1 year after the surgery shows mild ventricular dilatation and high-intensity changes in the thalamus and parietal lobe
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MR imaging just after the initial cycle of the CarE showed that the tumor disappeared [Figure 3].