摘要
恶性脑膜瘤生长速度快,具有明显侵袭性、术后容易复发及转移等特点。T1加权像均呈不规则混杂信号,以等低信号为多见,T2加权像以高等混杂信号为多见。增强扫描,肿瘤大多呈显著强化,且以不均匀强化常见,可出现囊变、坏死、出血信号。肿瘤形态多不规则,呈分叶状。"脑膜尾征"多表现为粗、短及不规则。可侵蚀、破坏相邻的颅骨,甚至可形成软组织肿物跨颅内外生长。脑膜瘤磁共振波谱Cho/Cr比值对脑膜瘤良、恶性鉴别诊断具有重要价值,MR PWl的rCBV值是评价脑膜瘤良恶性的有价值的指标,对指导临床选择正确的治疗方案及评估预后具有重要意义。常规MRI结ADC值的变化能明显提高对于良恶性脑膜瘤的鉴别诊断。现对其研究进展进行综述。
Malignant meningioma growed rapidly, had characteristics of obvious invasion, being easy to relapse and metastasis after surgery. Most tumors showed heterogeneous and low signal intensity on TIWI, and heterogeneous and high signal intensity on T2WI. Most tumors showed significant but inhomogeneous contrast enhancement. Most tumors appeared cystic changes, necrosis and bleeding signal. The tumors were irregular or lobulated in contour. ＂Dural tail sign,＇ showed short, thick and irregular. Most tumors displayed metastatic bony destruction, and appeared as soft tissue mass and sudden foreation to extracranial.lH MRS wass an useful diag- nostic method for differentiating benign from malignant meningiomas according to the Cho/Cr ratio. CBV map and quantitative study of rCBV are feasible for differential diagnosis of meningiomas and have instructive function for clinical treatment and assessment of prog- nosis. MR/tointegrate ADC values could make differential diagnosis of them more easily, thus provided guidances for treatment planning. The research progressi the application wereintroduced in this paper.
出处
《现代生物医学进展》
CAS
2013年第7期1381-1384,共4页
Progress in Modern Biomedicine
关键词
恶性
脑膜瘤
MRI
诊断
Malignant
Meningiomas
MRI
Diagnosis
