Department of Radiology, Seoul National University Bundang Hospital, 82 Gumi-ro 173beon-gil, Bundang-gu, Seongnam 13620, Republic of Korea.
Department of Radiology, Seoul National University Bundang Hospital, 82 Gumi-ro 173beon-gil, Bundang-gu, Seongnam 13620, Republic of Korea.
Clin Imaging. 2019 May-Jun;55:100-106. doi: 10.1016/j.clinimag.2019.02.007. Epub 2019 Feb 12.
To evaluate magnetic resonance (MR) imaging findings of spinal meningioma and to determine the radiological subtypes based on the MR imaging findings and their respective clinical features.
Data for 105 patients with surgically treated and histopathologically diagnosed spinal meningiomas at our hospital between May 1, 2003 and May 1, 2017 were evaluated in this study. Two radiologists reviewed the characteristics of spinal meningiomas on MR images and categorized the spinal meningiomas into subtypes based on MR imaging findings.
Most spinal meningiomas showed higher signal intensity than that of the spinal cord but lower than that of the subcutaneous fat on T2-weighted images (WI). 56 cases (54%) showed adjacent spinal cord signal changes. Meningiomas could be categorized according to MR imaging findings into type A: dural-based tumors with a homogeneous signal intensity and intense contrast enhancement (81 cases, 77%); type B: round or oval-shaped tumors with an internal hypointense portion on T2-weighted images (18 cases, 17%); type C: en plaque tumors (three cases, 3%); and type D: tumors with unusual findings and a heterogeneous appearance (three cases, 3%). All type C patients showed spinal cord signal changes.
Spinal meningioma showed slightly high signal intensity rather than high signal intensity on T2-weighted images. Spinal cord signal changes were present in more than half of the cases. Clinical differences were observed among the different MR imaging types.
评估脊髓脑膜瘤的磁共振成像（MR）表现，并根据 MR 成像表现及其各自的临床特征确定其放射学亚型。
本研究回顾性分析了 2003 年 5 月 1 日至 2017 年 5 月 1 日期间在我院接受手术治疗和组织病理学诊断的 105 例脊髓脑膜瘤患者的资料。两名放射科医生分析了脊髓脑膜瘤的 MR 图像特征，并根据 MR 成像表现将其分为不同亚型。
大多数脊髓脑膜瘤在 T2 加权图像（WI）上的信号强度高于脊髓但低于皮下脂肪，56 例（54%）表现为相邻脊髓信号改变。根据 MR 成像表现，脑膜瘤可分为 A 型：硬膜内肿瘤，信号均匀，强化明显（81 例，77%）；B 型：圆形或椭圆形肿瘤，T2WI 上内部呈低信号（18 例，17%）；C 型：贴壁型（3 例，3%）；D 型：表现异常，信号不均匀（3 例，3%）。所有 C 型患者均有脊髓信号改变。
脊髓脑膜瘤在 T2WI 上呈稍高信号而非高信号。超过一半的病例存在脊髓信号改变。不同 MR 成像类型之间存在临床差异。
