磁共振成像对颅内脑膜瘤水肿分析

目的：探讨脑膜瘤周围脑水肿的程度和肿瘤的生长部位．质地．组织学亚型的相关性．研究其瘤周水肿的形成原因．材料和方法：使用经手术和病理证实的65例脑膜瘤MRI和临床病理资料．观察分析脑膜瘤的瘤周水肿的程度．肿瘤的质地，组织学亚型等．结果：发生于大脑颅盖部或／和有矢状窦受累的脑膜瘤有明显的脑水肿．而发生于其它部位(颅底，丘脑、小脑、脑池等)无或只有轻度脑水肿．结论：轻度脑水肿主要是脑膜瘤对脑组织的直接压迫，而中，重度脑水肿主要是脑膜瘤对大脑表面引流静脉尤其是矢状窦的压迫或阻塞．脑水肿和肿瘤的发生部位有关，面和肿瘤的质地、组织学亚型无关．

The Analysis about Peritumoral Brain Edema in Meningiomas with MRI

Deducing the relationship among peritumoral brain edema,growing position,gross consistency and histological subtype about meningiomas.Investigating the cause of tumor's peripheral edema. Materials and Methods:The situation of the peritumoral edema degree,growing position,invading sagittal sinus,gross consistency and histological subtype in meningiomas were analysesed and studied with MRI at 0.35 T combining the clinic and pathologic materials. Besults:There was heavy peritumoral edema in meningiomas growing in cerebral convex or/and invading sagittal sinus. There was no peritumoral edema or only slight peritumoral edema in meningiomas growing in other position (skull base,cerebellar,thalamus,brain cisterna ect). Concltision:The main cause of slight peritumoral edema is the direct press of meningiomas to brain tissue. The main cause of heavy peitumoral brain edema is the press and obstruction of meningiomas to draining veins,especially sagittal sinus.It is relationship between peritumoral brain edema and turmor's position,but no relationship between peritumoral brain edema,gross consistency and histological subtype.