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Korean Journal of Otorhinolaryngology-Head and Neck Surgery > Volume 39(3); 1996 > Article
Korean Journal of Otorhinolaryngology-Head and Neck Surgery 1996;39(3): 425-37.
Clinical Study on the Enhancement of Repeated Gadolinium-enhanced MRI in Patients with Facial Nerve Paralysis
Tai Kwon Cho, MD
Department of Otolaryngology, National Police Hospital, Seoul, Korea
안면신경마비환자의 Gadolinium-enhanced MRI 추적검사에서 조영증강에 관한 임상적 연구
국립경찰병원 이비인후과

Gadolinium-enhanced magnetic resonance imaging(MRI) was performed in 16 patients with facial nerve paralysis ; 7 with Bell's palsy, 3 with herpes zoster oticus(HZO), and 6 with traumatic facial palsy. Fifteen of the sixteen patients showed the increased signal intensity of their facial nerves, with MRI. The geniculate ganglion(GG) including the distal part of the internal auditory canal segment(IAC) was more intensely enhanced segment in Bell's palsy, and the IAC was the greatest enhanced segment in HZO. It is assumed that the IAC is also involved in Bell's palsy, and it is the mainly involved segment in HZO. In traumatic palsy, the segments proximal to the GG could be seen even with increased signal intensity present within the mastoid. Repeated MRI was possible in 8 of 16 patients until complete recovery. The enhancement obtained by the first imaging shifted to the peripheral part of the facial nerve. It is assumed that inflammation or edema, which is shown as enhancement, shifts to the peripheral side of the facia nerve with the passage of time. The enhancement of the faciall nerve in the repeated MRI remained present even after complete return of facial function. It seems that MRI is effective in localizing the site of inflammation and edema during facial paralysis.

Keywords: Repeated magnetic resonance imagingFacial nerve paralysis.
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