Summary
A total of 162 patients with suspected acoustic neuromas underwent MR imaging at 1.5 T. All patients were injected with Gd DTPA or DOTA. In 72 patients, uni- or bilateral acoustic neuromas were detected. 18 cases were equivocal: In 9 cases, contrast enhancement was due to other tumors (5 meningiomas, 2 metastases, 1 hemangioma). In 1 case, misinterpretation resulted from partial volume effects with the petrous bone marrow. In one patient, previously operated on, increased signal was due to postoperative fat graft. Four hypersignals were due to intracanalicular venous or meningeal enhancement. Three cases are still equivocal. Most of the diagnostic problems may be obviated by precontrast MR imaging, multidimensional 3-mm sections, and fast imaging.
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Armington WG, Harnsberger HR, Smoker WRK, Osborn AG (1988) Normal and diseased acoustic pathway: evaluation with MR imaging. Radiology 167: 509–515
Gentry LR, Jacoby CG, Turski PA, Houston LW, Srother CM, Sackett JF (1987) Cerebellopontine angle-petromastoid mass lesions: comparative study of diagnosis with MR imaging and CT. Radiology 162: 513–520
Kingsley DPE, Brooks GB, Leung AWL, Johnson MA (1985) Acoustic neuromas: evaluation by magnetic resonance imaging. AJNR 6: 1–5
Mikhael MA, Ciric IV, Wolff AP (1987) MR diagnosis of acoustic neuromas. J Comput Assist Tomogr 11: 232–235
Mawhinney MB, Buckley JH, Worthington BS (1986) Magnetic resonance imaging of the cerebellopontine angle. Br J Radiol 59: 961–969
Young IR, Byoder GM, Hall AS et al (1983) The role of NMR imaging in the diagnosis and management of acoustic neuroma. AJNR 4: 223–224
Defilipp GJ, Buchheit WA (1985) Magnetic resonance imaging of acoustic neuromas. Neurosurg 16: 763–765
Valvassori GE, Morales FG, Palacios E, Dobben GE (1988) MR imaging of the normal and abnormal internal auditory canal. AJNR 9: 115–119
Curati WL, Graif M, Kingsley DPE, Niendorf HP, Young IR (1986) Acoustic neuromas: Gd-DTPA enhancement in MR imaging. Radiology 158: 447–451
Daniels DL, Millen SJ, Meyer GA et al (1987) MR detection of tumor in the internal auditory canal. AJNR 8: 249–252
Press GA, Hesselink JR (1988) MR Imaging of cerebellopontine angle and internal auditory canal lesions at 1.5 T. AJNR 9: 241–251
Brant-Zawadzki M, Norman D (1987) Magnetic resonance imaging of the central nervous system. Raven Press, New York
Breger RK, Papke RA, Pojunas KW, Haughton VN, Williams AL, Daniels DL (1987) Benign extra-axial tumors: contrast enhancement with Gd-DTPA. Radiology 163: 427–429
Watabe T, Azdma T (1989) T1 and T2 measurements of meningiomas and neuromas before and after Gd-DTPA. AJNR 10: 463–470
Graves VG, Schenn GW (1982) Clinical characteristics and CT findings in lipoma of the cerebellopontine angle: case report. J Neurosurg 57: 839–841
Daniels DL, Czervionke LF, Millen SJ (1988) MR findings in the Ramsay Hunt Syndrome. AJNR 9: 609
Mikhael MA, Ciric IS, Wolff AP (1985) Differentiation of cerebellopontine angle neuromas and meningiomas with imaging. J Comput Assist Tomogr 9: 852–856
Berry I, Brant-Zawadzki H, Osaki L, Brasch R, Nurovic J, Newton T (1986) Gd DTPA in clinical MR of the brain: 2. extra-axial lesions and normal structures. AJR 147: 1231–1235
Daniels DL, Herfkins R, Koehler PR, et al (1984) Magnetic resonance imaging of the internal auditory canal. Radiology 151: 105–108
New PF, Bachow TB, Wisher GL, Rosen BR, Brady TJ (1985) MR imaging of the acoustic nerves and small acoustic neuromas at 0.6 T: prospective study. AJR 144: 1021–1026
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Lhuillier, F.M., Doyon, D.L., Halimi, P.M. et al. Magnetic resonance imaging of acoustic neuromas: pitfalls and differential diagnosis. Neuroradiology 34, 144–149 (1992). https://doi.org/10.1007/BF00588162
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DOI: https://doi.org/10.1007/BF00588162