PMC5225700_01
Fluid attenuation inversion recovery axial image at the level of upper medulla shows tiny hyperintense foci in the dorsal aspect of medulla at the caudal end of fourth ventricle - Area Postrema (arrows)
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F1
Small hyperintense specks were seen symmetrically in axial fluid attenuation inversion recovery images in the dorsal aspect of the upper medulla at the caudal end of the fourth ventricle (area postrema) [Figure 1].
Mid sagittal T2-weighted image shows faint hyperintense linear streak in the dorsal aspect of upper medulla near the caudal end of fourth ventricle (arrow)
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F2
On sagittal T2-weighted images, thin streak-like hyperintensity was seen [Figure 2].
Diffusion weighted image shows no restriction
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F3
No restriction of diffusion or definite contrast enhancement was noted [Figures 3 and 4].
No enhancement seen on post contrast scan
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F4
No restriction of diffusion or definite contrast enhancement was noted [Figures 3 and 4].