Lulu He DO, Presenter: Nothing to Disclose

Aliye Ozsoyoglu Bricker MD, Abstract Co-Author: Nothing to Disclose

Todd Michael Emch MD, Abstract Co-Author: Nothing to Disclose

1. To review motor cranial nerve anatomy with focus on lesions in certain anatomical locations that can lead to denervation atrophy. 2. To showcase the variable appearance of denervation atrophy. 3. To demonstrate lesions that should lead one to look for resultant denervation atrophy in a quiz format.

1. Review the MR imaging appearance and enhancement pattern of cranial nerve denervation atrophy. Acute Subacute Chronic 2. Cases in a quiz format. Concise review of motor cranial nerve anatomy will be highlighted in the discussion of each case. The list of cases include but not limited to: CN 3 - Oculomotor nucleus infarct. CN 5 - Trigeminal cystic schwannoma CN 6 - Pontine abducens nucleus infarct. CN7 - Facial nerve injury after parotid gland removal and Perineural metastasis along CN 7. CN 10 & 11 - Jugular schwannoma CN12 - Skull base meningioma 3. Summary: Lesions along the course of the motor cranial nerves can lead to denervation atrophy. While the primary lesion may be readily apparent, its presence should direct one to search for the expected secondary effect of denervation atrophy which may be quite subtle. Additionally, one must be familiar with the stages of denervation atrophy so that it is not misdiagnosed.

http://abstract.rsna.org/uploads/2014/14002536/14002536_tmp2.pdf

He, L, Bricker, A, Emch, T, A Changed Face from a Lesion in a Far Off Space: A Pictorial Review of Cranial Nerve Denervation Atrophy.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14002536.html