Congenital facial nerve aplasia: MR depiction of a rare anom
We report two infants presenting with unilateral congenital facial palsy since birth. Magnetic resonance imaging (MRI) in both the cases revealed complete unilateral aplasia of facial nerve. To our knowledge, this is the first reported MR depiction of nonsyndromic isolated facial nerve aplasia. Imaging features and the pertinent anatomy is discussed along with a brief review of literature.

Case 1
A 6-month-old boy, born at full term by normal vaginal delivery, presented to us with facial asymmetry since birth. Since birth, mother of the child had observed incomplete eye closing on the right side while sleeping. There was no history of birth trauma or facial paralysis in the family. Physical examination showed an obvious facial asymmetry, incomplete eye closing on the right side, deviation of the angle of mouth toward the left side, and right-sided loss of nasolabial furrow.

Case 2
A 2-month-old boy presented with facial asymmetry and inability to close the left eye while sleeping. There was no history of birth trauma or birth asphyxia. Child cried normally after birth. On examination, child was unable to close the left eye and showed deviation of the angle of mouth toward the right side. Absent left nasolabial fissure was seen.

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