CN VII

Question 1

Causes of bilateral LMN facial weakness

Answer 1

1. GBS
2. Bilateral parotid disease eg sarcoid
3. Mononeuritis multiplex (rare)
4. Myopathy
5. NMJ defect

Question 2

Causes of LMN CN VII palsy

Answer 2

1. Pontine (assoc CN V & VI) - vascular, tumour, syringobulbia, MS
2. Posterior fossa - acoustic neuroma, meningioma
3. Petrous temporal bone - Bell’s palsy, Ramsay hunt, otitis media, fracture
4. Parotid - tumour, sarcoid