Congenital facial nerve hypoplasia
Left congenital facial palsy.
MRI petrous bone
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The left facial nerve (VII) could not be seen in either the cisternal or canalicular portions of its course. Normal calibre and intensity of the cranial nerve VIII bilaterally and the right cranial nerve VII.
Congenital facial nerve paralysis is rare and can be unilateral or bilateral. The congenital type is due to deficient facial nerve as in this case.