In our patient the facial nerve was situated in the external bony ear canal without bony protection just below the skin in the lower part of the external ear canal 2 to 3 mm lateral to the tympanic membrane.
This abnormal position involves a great risk of damage to the facial nerve by incisions in the ear canal prior to surgical intervention of the middle ear.
Greisen O. Aberrant Course of the Facial Nerve. Arch Otolaryngol. 1975;101(5):327–328. doi:10.1001/archotol.1975.00780340059013
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