颅内血管外皮细胞瘤与脑膜瘤的CT、MRI鉴别诊断

Study of characteristic differences in CTs and MRIs for intracranial hemangiopericytoma and meningioma to enable better and accurate diagnosis

目的研究颅内血管外皮细胞瘤（HPC）与脑膜瘤CT、MRI影像特征的差别。方法经手术病理证实的HPCI6例及脑膜瘤45例。术前均经MRI常规序列平扫、弥散加权（DWI）扫描、增强扫描及CT平扫。对两组肿瘤的CT、MRI表现指标进行统计学分析，统计学方法采用卡方检验。结果在两者之间，肿瘤外形（χ2=22．895）、瘤内坏死囊坏死信号（χ^2=15．959）、瘤内血管流空信号（χ2=8．058）、肿瘤明显强化（χ^2=7．942）等因素差异具有统计学意义（P〈0．01）；临近颅骨无增生（χ2=4．821）及DWI等低信号（χ^2=5．272）等因素差异具有统计学意义（P〈0．05）；而脑膜尾征（χ2=3．816）、瘤内钙化（χ^2=0．499）等因素差异无统计学意义（P〉0．05）。结论HPC与脑膜瘤的CT、MRI表现各有特点，通过征象对比分析，有助于提高两者的CT、MRI诊断水平，并为临床诊治提供帮助。

Objective To study the characteristic differences in CTs and MRIs between intracranial hemangioperieytoma （HPC） and meningioma. Methods 16 cases of HPC and 45 cases of meningioma approved by pathology were selected. All cases underwent MRIs, MR enhancements,DWIs, and CT scans before operation. The Mill and CT finding indexes of tumors between the two groups were analyzed statistically with the χ2 test. Results Tumors with lobulated shape （ χ2= 22. 895 ）, necrotic or cystic changes （ χ2 = 15. 959 ）, blood vessel flow void phenomenon （χ2= 8. 058 ）, and obvious enhancements （ χ2 = 7. 942） showed remarkably significant statistical differences （ P 〈 0. 01 ） between HPC and meningioma. The skull bad no hyperplasia near the tumor （χ2 =4. 821）and isointense and hypointense signal on DWI（χ2 =5. 272）showed statistically significant differences （ P 〈 0. 05 ）. ＂Dural tail＂ sign （ χ2= 3. 816 ） and tumor calcification （ χ2= 0. 499 ） showed no statistically significant differences （ P 〉 0. 05）. Conclusion There were differences between the CT and MRI findings of HPC and meningioma. It is helpful to improve the level of both CT and MRI diagnosis and clinical diagnosis and treatment through comparative analysis of the findings.