Diagnostic Value of CPA Tumors on Enhanced MRI
- VernacularTitle:MR增强检查在桥小脑角肿瘤的诊断价值
- Author:
Mao LI
;
Shuming LIANG
- Publication Type:Journal Article
- Keywords:
MRI;
enhancement;
CPA,tumor
- From:
Journal of Practical Radiology
2000;0(12):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore enhanced MRI diagnostic value of CPA(cerebellopontine angle) tumors.Methods 68 cases of CPA tumors,including acoustic neuromas(n=34),trigeninal neuromas (n=5),meningiomas(n=20)and cholesteatomas(n=9),proved surgically and pathologically were studied.All patients were performed MR scans before and after contrasted-enhancement on axial,sagittal and coronal plane.Results 23 of 34 acoustic neuromas showed nodule-ring-like,wreathlike or mutilocular enhanced masses;11 were homogeneous masses.The facial-hearing nerve bundle were markedly thickened and enhanced in 34 cases and in which 15 presented "water-chestnut"sign;suggesting it was a typical appearance of acoustic neuromas.5 trigeminal neuromas manifested nodule-ring-like or multilocular enhanced masses(n=3),and dumbbell-like masses(n=2).20 meningiomas exhibited homogeneous massive enhancement,"dural tail"sign(n-11),the facial-hearing-nerve bundle on the affected side were enhanced but not thickened(n-5);which represented reactive changes to the tumors.9 cholesteatomas displayed long T 2 long T 1,no enhancement;spreaded along subarachnoid space and basilar artery encapsuled(n-5).Conclusion Enhanced MRI can reveal the characteristics of CPA tumors,it is of especial value for diagnosis of the tumors.
