MRI
MRI reveals a focal abnormal signal in the pons' right dorsal aspect, traversing the pontine tract of the trigeminal nerve on the same side. The affected area demonstrates a faint low signal on T1-weighted sequences and a bright signal on T2/FLAIR sequences. No evidence of blooming, diffusion restriction, or enhancement following gadolinium administration exists. Additionally, no mass effect or perifocal edema is present.
Impression: The clinical presentation and MRI findings are initially consistent with the Fisher-Bickerstaff spectrum.