PMC4521314_01
First case. (a) Preoperative gadolinium enhanced T1-weighted axial magnetic resonance imaging, showing an in homogenously enhancing mass in the third ventricle causing mild hydrocephalus. (b) Postoperative axial computed tomography-scan showing complete removal of the lesion and absence of hydrocephalus
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F1
T1-weighted gadolinium-enhanced images a 25 mm x 25 mm x 20 mm measuring cystic lesion was seen [Figure 1] causing mild obstructive hydrocephalus. The mass itself was also strongly contrast enhanced, leading us to believe the cyst wall contained some aberrant vessels.
PMC4521314_02
Second case. (a) Preoperative gadolinium enhanced T1-weighted axial magnetic resonance imaging, showing a gigantic cystic lesion in the third ventricle causing hydrocephalus. Note the enhancing vessels on the cyst wall. Artifact is due to the occipital venticuloperitoneal-shunt. (b) Postoperative axial computed tomography-scan showing extirpation of the cyst content and no signs of increased intra-cranial pressure
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F2
Preoperative gadolinium-enhanced T1-weighted MRI showed a huge, 52 mm x 42 mm x 39 mm measuring, hypointensive cystic lesion in the third ventricle that had progressively expanded upward to the corpus callosum, displacing the septum pellucidum and bulging in the lateral ventricles [Figure 2].
Second case diffusion tensor imaging (DTI). Preoperative DTI fiber tracking. Coronal (a) and axial (b) images showing a pronounced displacement of the fornices inferiorly and to the right. The artifact is due to the ventriculoperitoneal-shunt
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F3
Diffusion tensor imaging (DTI) fiber tracking visualized a pronounced displacement of the fornices to the right [Figure 3].