PMC3917879_01
MRI images of the patient for the first time (A, B) and one month later (C, D). Arrows show the abnormal signals on T2-weighted imaging (T2WI) (A) and FLAIR axial (B) images in the bilateral thalamus, mid-brain, pons and medulla, but no abnormal signal is found on T1-weighted imaging (T1WI). MR images done one month later (C) show that the unusual signals in thalamus, mid-brain, pons and medulla once found on T2WI have all gone. FLAIR coronal images (D) are negative, but FLAIR axial images were not done in the second hospital.
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Then the cerebral MRI scan showed symmetrical hyper-intense signals on T2-weighted imaging (T2WI) and fluid-attenuated inversion recovery (FLAIR) in the bilateral thalamus, mid-brain, pons, and medulla (Figure 1A, 1B). A follow-up cerebral MRI 1 month later in another hospital found that the abnormal signals all disappeared (Figure 1C, 1D).