Cerebral magnetic resonance imagery performed a few hours after onset of symptoms demonstrated T2‐FLAIR hypersignals of the intracranial and meatal segments of the two facial nerves as well as the left hypoglossal nerve, with T1 gadolinium enhancement. There was no sign of hemorrhage, ischemia, or PRES syndrome (see Figure 1). Cerebrospinal fluid (CSF) examination, performed 18 h after onset of symptoms , found normal protein level 25 mg/dL (reference range 15‐60 mg/dL), glucose 66 mg/dL, white blood cells 1/μL (reference range 0‐5/μL). CSF Gram stain and culture were negative, as well as polymerase chain reaction (PCR) targeting HSV, varicella, enterovirus, EBV, human Herpesvirus (HHV) 6, HHV8, adenovirus, mycoplasma, Cryptococcus, and toxoplasma nucleic acids. A second CSF examination performed 48 h after onset of symptoms was also found unconclusive. C‐reactive protein (CRP) never exceeded 10 mg/L during this neurological phase.