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FIG 1. Patient 2, a 40-year-old man admitted with encephalitis and developed flaccid paralysis during hospitalization: axial FSE T2-weighted (A) and trace DW (B) images demonstrate increased signal intensity in the pontine tegmentum. Increased signal intensity was also seen in the superior cerebellar peduncles on FSE T2-weighted image (C), but not on the trace DW image (D). The patient was intubated at the time of imaging, which resulted in opacified sinuses and mastoid air cells. Axial GRE sequences through the cervical (E) and thoracic cord (F) show abnormal signal intensity in the gray matter with more pronounced involvement of the ventral horns. Postcontrast sagittal T1-weighted image (G) demonstrates enhancement of the cauda equina.
