Diffusion-Weighted Magnetic Resonance Neurography for Parapharyngeal Schwannomas: Preoperative Determination of the Originating Nerves

作者：Kitazume Yoshio^*; Ohashi Isamu; Katayama Takashi; Tsunoda Atsunobu; Kishimoto Seiji; Negi Mariko

来源：Journal of Computer Assisted Tomography, 2014, 38(6): 930-935.

• diffusion magnetic resonance imaging
• neurilemmoma
• ganglia
• sympathetic
• vagus nerve
• neck
• feasibility studies

Objective: The aim of this study was to assess the feasibility of diffusion-weighted (DW) magnetic resonance neurography (MRN) for determining the originating nerve of parapharyngeal schwannomas preoperatively. %26lt;br%26gt;Methods: Six patients who underwent DW-MRN preoperatively for a parapharyngeal schwannoma were studied. Prediction of the originating nerve was performed. With the conventional method, a tumor showing %26quot;separation%26quot; between the internal jugular vein and carotid artery was determined to originate from the vagus nerve, with %26quot;no separation%26quot; from the sympathetic chain. With DW-MRN, the relationships between the vagus nerve and sympathetic chain to the tumor were characterized as %26quot;connected%26quot; or %26quot;dislocated.%26quot; A nerve connected to the tumor was determined as the origin. %26lt;br%26gt;Results: Surgeries revealed that the origins included 1 vagus nerve and 5 sympathetic chains. Using a conventional method, all 6 cases were diagnosed correctly, whereas DW-MRN successfully predicted only 4 cases with a sympathetic chain origin. %26lt;br%26gt;Conclusions: The DW-MRN is a feasible approach for determining an originating nerve.

• 出版日期2014-12