MR Findings to Predict the Site of Dural Attachment in Meningiomas

ABSTRACT

PURPOSE: To study the MR findings to predict the site of dural attachment in meningiomas. MATERIALS AND METHODS: We retrospectively reviewed MR findings of 23 patients with surgically confirmed meningiomas and analysed the characteristics of dural attachment site of meningiomas and tumor growing vector against dura. RESULTS: In the 10 cases that tumor had a single dural base, the dural base was tumor bed. in the 2 cases that tumor had more than two dural bases, wider, irregular and thicker enhancing dura was tumor bed. In the 7 of the 11 cases of diffuse dural bases with tumor, we could predict tumor bed considering the degree of compression to the brain parenchyma and the tumor growing vector. CONCLUSIONS: In the case of tumor having more than two surfaces contacting the dura or with narrow attachment site, it is possible to predict the site of dural attachment if we consider the characteristrics of dural attachment site and tumor growing vector against dura.