PMC4790151_01
Axial T2-weighted image showing a hyperintense lesion in the fourth ventricle, suggestive of a fourth ventricular epidermoid cyst
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F1
Diffusion-weighted images showed a restricted diffusion [Figures 1-3].
Sagittal T1-weighted image of the posterior fossa and upper cervical spine showing the hypointense lesion in the fourth ventricle and another lesion in the upper cervical spine. The two lesions are separate from each other
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F2
Diffusion-weighted images showed a restricted diffusion [Figures 1-3]. There was a distinct region without any tumor between the fourth ventricular and the spinal components [Figure 2].
Diffusion-weighted image showing the restricted diffusion typical of an epidermoid cyst
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F3
Diffusion-weighted images showed a restricted diffusion [Figures 1-3].
Intraoperative image showing the fourth ventricular epidermoid and another epidermoid cyst in the region of the upper cervical spine, distinct from each other
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F4
On opening the dura, pearly white flakes with a thin surrounding capsule consistent with an epidermoid tumor was identified in the fourth ventricle and in the cervical spinal subdural space [Figure 4].
Postoperative diffusion-weighted image showing near-total excision of the tumor
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F5
Postoperative magnetic MRI showed a gross total excision of the craniospinal epidermoid [Figure 5].