[Preoperative Neuroimaging of Cerebellopontine Angle Tumors with an Emphasis on Techniques and Differential Diagnosis].

MRI is the most effective imaging tool for diagnosing cerebellopontine angle tumors, although CT is also useful for evaluating bone changes and detecting calcification. Regarding MRI, it is recommended to efficiently use MR cisternography, a small imaging field of view, and a thin slice thickness. The most common tumor type is acoustic schwannoma, followed by meningioma, trigeminal, facial nerve, jugular foramen schwannoma, paraganglioma, and others. Many of these tumor types can be effectively differentiated by combining various CT and MRI techniques, as stated above, as well as MRA, perfusion imaging, MR digital subtraction angiography, MR spectroscopy, and bone imaging. This article discusses the key MRI and CT findings of major cerebellopontine angle tumors, as well as some representative cases and the corresponding differential diagnoses.