Mathieu Rodallec MD, Presenter: Nothing to Disclose

Francoise Cyna-Gorse MD, Abstract Co-Author: Nothing to Disclose

Annick Hélias, Abstract Co-Author: Nothing to Disclose

Jean-Michel Colombani, Abstract Co-Author: Nothing to Disclose

Olivier Sterkers MD, Abstract Co-Author: Nothing to Disclose

Valerie Vilgrain MD, Abstract Co-Author: Nothing to Disclose

1.To understand the contribution of CT and MR to the diagnosis of space-occupying lesions of the temporal bone. 2.Demonstrate the MR and CT imaging features of temporal bone lesions using a segmental analysis. 3.To learn the imaging features and differential diagnosis of various temporal bone lesions.

A variety of pathologies involving the temporal bone include neoplastic lesions, infectious and noninfectious inflammatory lesions. Clinical presentation is not sufficiently specific to differentiate diagnoses. Our purpose is to provide a comprehensive review of the current contribution of CT and MR in the diagnosis of temporal bone lesions. In this exhibit, we will demonstrate the CT and MR imaging features of temporal bone lesions using a segmental approach of the temporal bone, and correlate these lesions with their clinical presentation. The site of origin is the main factor in making a preoperative diagnosis for temporal bone lesion. In addition, it is essential to analyze attenuation at CT, signal intensity at MR, enhancement, shape and margins, extent, mass effect, and adjacent bone reaction to match imaging characteristics to differential diagnostic list. This education exhibit is illustrated with many common and also less common temporal bone lesions.

Rodallec, M, Cyna-Gorse, F, Hélias, A, Colombani, J, Sterkers, O, Vilgrain, V, A Practical Approach to Temporal Bone Lesions.  Radiological Society of North America 2005 Scientific Assembly and Annual Meeting, November 27 - December 2, 2005 ,Chicago IL. http://archive.rsna.org/2005/4412885.html