The value of MRI in diagnosis of malignant meningioma
- VernacularTitle:MRI对恶性脑膜瘤的诊断价值
- Author:
Wei CUI
1
;
Haibo WANG
;
Yucong WANG
;
Mengda CHEN
;
Liming HUANG
Author Information
1. 宁波市鄞州人民医院放射科
- Keywords:
Magnetic resonance imaging;
Meningioma;
Malignant;
Diagnosis
- From:
China Modern Doctor
2014;(23):52-54
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the value of magnetic resonance imaging (MRI) in the diagnosis of malignant meningioma. Methods Analyzed MRI examination and other clinical data of 19 patients with malignant meningioma retrospectively, and the tumor location, size, shape, signal characteristics of MRI, peritumoral edema and the surround-ing tissue infiltration were observed. Results Meningiomas were mainly located at the convexity of brain and sagittal si-nus, diameters were 1.6~11.8 cm, tumors showed lobulated shape in 7 cases, irregular shape were showed in 8 cases, o-val in 4 cases; The boder was clear in 6 cases, ill defined in 13 cases, and invaded the surrounding tissue in varying degrees;Edema in varying degrees were seen in 15 cases;The tumors were low hypointense on T1 weighted (T1WI) im-ages in 8 cases, low, equal mixed signal in10 cases, high signal in 1 case, The tumors were hypointense on T2 weighted (T2WI) images in 2 cases, equisignal in 4 cases, high signal and equisignal in 13 cases, homogeneous signal in 6 cases, inhomogeneous signal in 13 cases, irregular necrosis or cystic areas were seen inside; Homogeneous enhancement were seen in 4 cases, heterogeneous enhanced in 15 cases. Short and thick irregular "dural tail sign" were showed in tu-mours surrounding in 13 cases. Conclusion Malignant meningioma has characteristics in MRI, MRI examination has important value in the qualitative diagnosis, and localization diagnosis in malignant meningiomas.
