MRI of Lateral Skull Base Lesions

Abstract

This article reviews the role of magnetic resonance imaging (MRI) in the evaluation of lateral skull base lesions. Due to superior softtissue resolution and multiplanar capability, MRI provides accurate information and exquisite anatomical detail. Thus, it guides thesurgeon in proper preoperative planning regarding the approach of a lesion. MRI is also useful in post-treatment follow-up to assess thetherapeutic response and to identify potential complications. We discuss the relevant anatomy, indications of MRI and MR pulse sequencesused in the diagnosis of lesions of lateral skull base. Characteristic MRI findings of various lesions which help to arrive at a specificdiagnosis as well as pitfalls of MRI which may confound the diagnosis are described. Newer MR pulse sequences enable image-guidedsurgery, which assist the surgeon intraoperatively, are briefly discussed. In summary, this article emphasizes the role of MRI in providinga specific answer to a clinical problem and its ability to guide the clinician for better management of patients.