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Objective To discuss the diagnosis and treatment of microneuro-surgery for meningiomas of the lateral ventricle.Methods A retrospe CT analysis was performed on 20 patients with meningomas of the lateral ventricle during a 7-year period.Results 20 cases had total tumor removal.among them 6 cases were completed removal,14 cases were cent piece removal.There were no postoperative deaths.The follow-up period ranged from 0.5 to 7 years.All followed patients went well.Conclusion Lateral ventricular meningiomas can be diagnosed by CT or MRI and fedding vascular of tom or revealed by cerebral vascular angiography.By using the ideal approach,the tumors could be totally removed under microscope.
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Objective:To evaluate the relationship between MRI features and pathological types of intracranial meningomas.Methods:32 cases of meningoma which were proved by operation and pathology were compared with their MRI features and pathological types.Results:All of the 32 cases were single tumor,The lesions were located in frontal,parietal,and occipital regions nearby the convexity of the brain in 18 cases,at sphenoidal crest in 8 cases,at olfactory sulcus in 4 cases,and in sellar region 2 cases.MRI manifested that 13 cases had their intergral capsules,peri-tumor edema was found in 29 cases,dural“tail” sign was present in 9 cases,calcification in the tumors were found in 3 cases and vascular flow void features was seen in 5 cases,20 cases appeared homogeneous enhancement.Conclusion:It is of great value in presenting the location of meningoma with MRI.Combination of several MRI features could be used to figure out the pathological type of meningoma by a comprehensive analysis.
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The histopathologic findings of the intracranial meningima are variegated and those of magnetic resonance imaging (MRI) which has been used for preoperative evaluation are also varied in signal characteristics. In order to aid the preoperative diagnosis, authors analyzed MRI and microscopic findings in twenty eight meningioma cases which underwent surgery. The results were summarized as follows : 1) Meningothelial, fibrous and transitional subtypes showed isointense signal on T1-weighted image and iso and/or hyperintense signal T2-weighted and proton density images compared to the signal intensity of the gray matter. 2) Microcystic subtype was isointense signal on T1-weighted image and hyperintense signal on T2-weighted and proton density images. 3) Variation of signal intensity might be correlated to the ratio of the stroma in the tumor. 4) Peritumoral edema was not closely related to the pathologic subtypes or location of meningioma, but it seemed to be correlated with the size of tumor.