三叉神经瘤影像学诊断的价值

三叉神经瘤１４例，１２例做ＣＴ检查，２例做ＭＲＩ检查，１４例术后均经病理检查证实。１２例ＣＴ扫描呈混杂密度６例，均匀高密度５例，等密度１例，注射造影剂后多呈不均匀强化，肿瘤周围均无脑水肿。２例ＭＲＩ图像Ｔ１加权像呈低信号，Ｔ２加权像呈高信号。Ｘ线平片示１１例有岩骨、颅底骨吸收破坏。临床常伴有听神经、面神经等受累。ＣＴ和ＭＲＩ是诊断三叉神经瘤的有效检查方法。三叉神经瘤应与脑膜瘤、胶质瘤及听神经瘤等相鉴别。

THE VALUE OF IMAGE DIAGNOSIS ON TRIGEMINAL TUMOR

Among 14 cases of trigeminal tumor,12 cases were examined by CT scanning,2 cases by MRI,all of them were confirmed by pathological examination.The density appeared heterogeneous with 6 cases,homogeneous high density with 5 cases and isopyknic with 1 case.Dropped contrast medium,the 12 CT scanning pictures appeared heterogeneous potentialization,and there were no cerebral edema around the tumor.Among 2 cases examined by MRI,T1 weighted image appeared low signal,T2 weighted image appeared high signal.The Xray showed that 11 cases have destruction on absorption of petrous bone,and basicranial bone.It often has involvement with auditory nerve and facial nerve in clinic.In summary,CT scanning and MRI are effective methods to diagnose the trigeminal tumor,and the trigeminal tumor should be distinguished with meningoma,glioma and acoustic neurinoma.