Question: A 19 year old female is evaluated for progressive facial paralysis and found to have an enhancing lesion extending from the labyrinthine portion of the facial nerve to the stylomastoid foramen. What is the approximate diameter of the labyrinthine portion of CN VII?

[Answer will be posted with next week's new question]

Answer to last week's question, "Born With It?" (November 12, 2018)

Yes - a unilateral VS plus two meningiomas satisfies criteria for NF2. Genetic testing would be appropriate to confirm.