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目的:探讨MRI对本病的诊断价值。方法:22例经手术病理证实资料完整的听神经瘤。结果:22例中有2例微小听神经瘤,MRI表现病侧第Ⅶ、Ⅷ神经束局部结节状等或稍低信号。注射Gd-DTPA后瘤体呈小结节状均匀强化。20例为大的听神经瘤,T1WI呈低或稍低、低混杂信号,T2WI呈高信号或稍高、高混杂信号,患侧第Ⅶ、Ⅷ神经束比对侧增粗,与肿瘤无明确分界,两者信号变化一致,注射Gd-DTPA后肿瘤呈明显不均匀性、均匀性或环状强化。本组定位,定性诊断准确率为100%。结论:MRI是诊断听神经瘤非常有效的方法,应作为听神经瘤的术前首要检查方法。
Objective: To investigate the diagnostic value of MRI for this disease. Methods: Twenty - two patients with complete acoustic neuroma confirmed by surgery and pathology. Results: There were 2 cases of acoustic calcifications in 22 cases, MRI showed partial nodules of Ⅶ and Ⅷ nerve bundles, etc., or slightly lower signals. After injection of Gd-DTPA tumors showed nodular uniform enhancement. 20 cases of large acoustic neuroma, T1WI was low or slightly lower, mixed signals, T2WI was high signal or slightly higher, mixed signals, ipsilateral Ⅶ, Ⅷ nerve bundles thicker than the contralateral side, no clear boundary with the tumor , The signal changes of both were consistent, the tumor showed obvious inhomogeneity, uniformity or ring enhancement after injection of Gd-DTPA. The group positioning, qualitative diagnostic accuracy of 100%. Conclusion: MRI is a very effective method for the diagnosis of acoustic neuroma and should be considered as the preoperative preoperative screening method for acoustic neuroma.