Aaron Skolnik MD, Presenter: Nothing to Disclose

Kim Learned MD, Abstract Co-Author: Nothing to Disclose

Linda Jane Bagley MD, Abstract Co-Author: Nothing to Disclose

Laurie A. Loevner MD, Abstract Co-Author: Nothing to Disclose

1. Review the general MR imaging features of cranial nerve (CN) schwannomas. 2. Demonstrate the scope of CN schwannomas arising from the intracranial and skull base courses of each of the 12 CNs highlighting relevant anatomic features of the courses of the cranial nerves. 3. Correlate the patient's clinical presentation with the location and degree of mass effect and end organ sequelae to aid in diagnosis of CN schwannomas.

1. General imaging features of cranial nerve (CN) schwannomas      a. Classic appearance: oval avidly enhancing mass      b. Commonly heterogeneous enhancement, cystic degeneration and rarely hemorrhage 2. Illustrative examples of CN schwannomas affecting all 12 CNs including typical and atypical examples highlighting relevant anatomic considerations and structures affected by mass effect      a. Correlation of anatomic knowledge with clinical presentation can aid in detection and characterization of causative schwannoma, for example, a patient with diplopia warrants careful evaluation of the ambient cistern      b. End organ effects, for example, atrophy of muscles of mastication or extra-ocular muscles can aid in ability to diagnose nerve of origin      c. Bilateral CN VIII and other CN schwannomas in Neurofibromatosis type II

http://abstract.rsna.org/uploads/2014/14016508/14016508_2tky.pdf

Skolnik, A, Learned, K, Bagley, L, Loevner, L, A Dozen Cranial Nerves with Dozens of Schwannomas: Diagnostic Approach to Intracranial and Skull Base Cranial Nerve Schwannomas.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14016508.html