沟通性脑膜瘤的MRI诊断

目的:分析沟通性脑膜瘤的MRI表现,提高对特殊类型脑膜瘤的认识.方法:回顾性分析7例经手术和病理证实的沟通性脑膜瘤的MRI及有关临床资料,全部病例术前均行MRI平扫和Gd-DTPA增强检查.结果:肿瘤形态呈分叶结节状,大小不一,在T1WI和T2WI序列上均呈较均匀等或稍长信号,部分瘤体边缘不清,无坏死、囊变、出血和钙化,增强扫描呈均匀明显强化;4例伴有颅底解剖腔(孔)变形或扩大,颅底骨质局限性吸收、硬化或破坏共5例;5例术后病理可见肿瘤结构异型性,其中1例可见核分裂像、呈低度恶性.结论:沟通性脑膜瘤有一定的MRI特征,仔细分析肿瘤的起源部位和信号特点有助于作出正确的诊断.

MRI Diagnosis of Communicating Meningioma

Objective:To study the MRI features of communicating meningioma,and improve the understanding of special type of meningioma.Methods:MRI findings of 7 cases proved by operation and pathology were reviewed retrospectively.All of cases were performed Gd-DTPA enhancement.Results:Size and shape of all 7 cases were different from each other,MRI findings of all tumors showed non-calcified mass with no hypointense cystic areas,presented as homogeneous iso-or slightly hyposignal intensity both on T1WI and T2WI,enhanced remarkable after injecting Gd-DTPA.Anatomic foramen or spaces of skull were deformed or enlarged to a certain extent in 4 cases.Five cases showed osteosclerosis and detruction of bone.In 5 of 7 cases pathological examination showed architectural atypia,and one case showed cellular atypia.Conclusion:There are several features on the MRI of communicating meningioma,analying the tumor origin and signal intensity can help to diagnose communicating meningioma correctly.