脊索样型脑膜瘤的CT和MRI表现

发布时间：2018-03-01 02:19

本文关键词： 脊索样脑膜瘤体层X线计算机磁共振成像病理学　出处：《临床放射学杂志》2015年08期 　论文类型：期刊论文

【摘要】：目的探讨脊索样型脑膜瘤(CM)CT与MRI表现特征。方法搜集经手术病理证实的25例CM患者的影像学资料。全部患者均接受MRI并行增强扫描,其中9例行CT平扫。回顾性分析其发病部位、CT与MRI表现。结果 25例中,肿瘤位于大脑凸面4例(16%);大脑镰旁4例(16%);第三脑室3例(12%),侧脑室1例(4%),第四脑室1例(4%);岩斜区3例(12%);鞍旁3例(12%);枕骨大孔区2例(8%);蝶骨嵴2例(8%);鞍结节1例(4%);桥小脑角区1例(4%)。平扫CT,2例稍高密度,4例等密度,2例表现为稍低密度,1例等低混杂密度。MRI表现:T1WI呈稍低或等信号24例(96%),低信号1例(4%);T2WI呈稍高及等信号23例(92%),明显高信号2例(8%)。增强扫描不均匀明显强化18例(72%),均匀明显强化7例(28%);8例(32%)瘤周见中重度水肿。12例(48%)可见"脑膜尾征";2例(8%)侵及脑组织,1例(4%)邻近颅骨破坏改变。结论 CM的发病部位与常见脑膜瘤无明显差别,CT平扫也少有特征性。当MRI及增强扫描发现有"筛网"状或"蜂窝"状强化和/或有突破软脑膜而侵袭周围脑组织等表现时结合临床可考虑对本病的诊断。
[Abstract]:Objective to investigate the CT and MRI features of spinal cord like meningioma. Methods the imaging data of 25 patients with CM proved by operation and pathology were collected. Among them, 9 cases were performed plain CT scan. Ct and MRI findings were analyzed retrospectively in 25 cases. The tumors were located on the protrusions of the brain in 4 cases, on the protrusions of the brain in 4 cases; on the parietal falciparum in 4 cases; on the third ventricle in 3 cases; on the third ventricle in 12 cases; on the lateral ventricle in 1 case; on the lateral ventricle in 1 case; on the 4th ventricle in 1 case; on the lateral ventricle in 1 case; on the 4th ventricle in 1 case; on the petroclival region in 3 cases; on the oblique area of the saddle in 3 cases; on the parasellar region in 3 cases; on the occipital foramen in 2 cases; on the sphenoid ridge in 2 cases; on the Sellar tubercle in 1 case; Plain CT scan 2 cases with slightly high density and 4 cases with isodensity, 2 cases with slightly low density, 1 case with slightly low density and 1 case with iso-low mixed density. MRI showed slightly low or equal signal intensity on T 1WI in 24 cases, and low signal intensity on T2WI in 1 case with slight hyperintensity and iso-intensity on T2WI in 23 cases, which was obviously high. Signal intensity in 2 cases was superior to that in 8 cases. Heterogeneous enhancement was found in 18 cases, and even enhancement in 7 cases (28 / 28) and in 8 cases (32 / 32). There was moderate and severe edema around the tumor. 12 cases were characterized by moderate and severe edema. (48) the "meningeal tail sign" (2 cases) and cerebral tissue invasion (1 case) and brain tissue (1 case) adjacent to the skull were found to be damaged. There was no significant difference between the location of CM and the common meningiomas and there were few features on CT plain scan. When MRI and enhanced scan revealed "sieve" or "honeycomb" enhancement and / or breakthrough of pial meninges and invasion of peripheral brain tissues, etc. At present, the diagnosis of this disease can be considered in combination with clinical practice.
【作者单位】：首都医科大学附属北京天坛医院神经影像中心;华中科技大学同济医学院附属同济医院放射科;
【分类号】：R739.45;R445.2;R730.44

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