MRI Features and Differential Diagnosis of Atypical Meningioma
LU Fei-fei1, XIAO Hui2,
SONG Juan1, YU Hao1, YIN Can1,
LI Tian-fei1
1.Fuzhou Teaching Hospital of Bengbu
Medical College (Fuzhou General Hospital
of Nanjing Military Region), Fuzhou
Fujian 350025, China; 2.Medical Imaging
Center, Fuzhou General Hospital of
Nanjing Military Region, Fuzhou Fujian
350025, China
Abstract：Objective To analyze the Magnetic Resonance Imaging (MRI) features of atypical
meningioma so as to improve accuracy of diagnosis and differential diagnosis to atypical meningioma.
Methods Totally 19 cases of atypical meningiomas verified by operation and pathological examination
were retrospectively analyzed, and compared with 20 cases of glioblastoma as well as 13 cases of
brain solitary metastases. All patients were simultaneously performed by routine MRI examination and
detection of diffusion weighted imaging (DWI). Among them, 7 cases of meningioma, 9 cases of brain
solitary metastasis and 16 cases of glioblastoma were additionally detected by H1-magnetic resonance
spectroscopy (H1-MRS). Differences in the three groups were analyzed. Results Atypical meningioma
mostly revealed mild peritumoral edema with edge blur. The solid area of atypical meningioma mostly
showed strengthening on the whole tumor, and strengthening degree was more obvious than that of brain
solitary metastasis or glioblastoma. Besides, the cyst wall inside the tumor was completely strengthen,
but the cyst wall surrounding the tumor showed partially strengthen. DWI revealed apparent diffusion
coefficient (ADC) values of tumor solid area as well as peritumoral edema among the three groups were
of no significant difference, whilst ADC values of peritumoral edema in glioblastoma and brain solitary
metastasis respectively showed significantly different (P=0.021). MRS indicated that the three groups
all showed obvious rise in choline (Cho) peak but visible decline in N-acetylaspartate (NAA) peak. In
addition, atypical meningiomas showed inconspicuous NAA peak, and less possibility of obvious lipid
(lip) peak or lactic acid (lac) peak as compared with the other two tumors mentioned above. Conclusion
MRI features of atypical meningioma were various, but it still had certain characteristics. Multimodality
imaging examination method could be applied to improve the diagnostic accuracy of atypical
meningoma.
陆菲菲1，肖慧2，宋娟1，虞浩1，
殷灿1，李田飞1. 非典型脑膜瘤的MRI表现及鉴别诊断[J]. 中国医疗设备, 2017, 32(2): 60-64.
LU Fei-fei1, XIAO Hui2,
SONG Juan1, YU Hao1, YIN Can1,
LI Tian-fei1. MRI Features and Differential Diagnosis of Atypical Meningioma. China Medical Devices, 2017, 32(2): 60-64.
