鼻腔鼻窦炎性肌纤维母细胞瘤的CT与MRI表现

发布时间：2018-04-09 02:37

本文选题：炎性肌纤维母细胞瘤　切入点：鼻腔　出处：《临床放射学杂志》2014年12期

【摘要】：目的探讨鼻腔鼻窦炎性肌纤维母细胞瘤的CT与MRI表现。方法回顾性分析16例经手术病理证实的鼻腔鼻窦炎性肌纤维母细胞瘤的CT与MRI资料,其中9例行CT平扫,15例行MRI常规平扫和增强扫描,8例同时行MRI动态增强扫描。结果发生于上颌窦11例,筛窦2例,鼻前庭2例,上颌骨颧突1例;10例表现为不规则肿块,6例沿窦壁浸润性生长。CT表现:与脑实质相比,病变呈等密度5例,不均匀略低密度4例;受累窦壁骨质破坏伴残端骨质硬化6例,硬化肥厚1例,骨质破坏伴瘤骨1例。MRI表现:与脑实质相比,T1WI呈等信号,T2WI呈不均匀信号;主体呈低信号6例,等信号7例,高信号2例;增强扫描病变呈明显强化13例,中等强化2例。8例动态增强扫描的时间-信号强度曲线为速升缓降型。蔓延至邻近结构:翼腭窝、颞下窝11例,眼眶9例,面颊部皮下组织5例,鼻腔4例。结论骨质破坏伴残端骨质硬化,T2WI呈低或等信号,MRI明显强化和速升缓降型时间-信号强度曲线是鼻腔鼻窦炎性肌纤维母细胞瘤的较具特征性表现。
[Abstract]:Objective to investigate CT and MRI findings of sinusitis myofibroblastoma of nasal cavity.Methods CT and MRI findings of 16 cases of nasosinusitis myofibroblastoma proved by surgery and pathology were retrospectively analyzed. Among them, 9 cases underwent plain CT scan and 15 cases underwent conventional MRI scan and 8 cases underwent MRI dynamic enhanced scan simultaneously.Results in 11 cases of maxillary sinus, 2 cases of ethmoid sinus, 2 cases of nasal vestibule, 1 case of zygomaticoid process of maxilla and 10 cases of maxillary zygomaticoid process showed irregular mass and 6 cases of infiltrating growth along the wall of sinus: compared with cerebral parenchyma, the lesion showed isodensity in 5 cases.There were 4 cases of heterogeneity and low density, 6 cases of osseous destruction of the involved sinus wall with residual bone sclerosis, 1 case of sclerosis and hypertrophy, 1 case of bone destruction with tumor bone. MRI findings: compared with brain parenchyma, MRI showed iso-signal intensity on T _ 1WI and heterogeneous signal on T _ 2WI, and low signal intensity on main body in 6 cases.There were 7 cases of iso-signal intensity, 2 cases of hyperintensity, 13 cases of contrast-enhanced lesions and 2 cases of moderate enhancement in 8 cases. The time-signal intensity curve of dynamic contrast enhanced scan was of the type of rapid rise and slow decrease.The adjacent structures were pterygopalatine fossa, infratemporal fossa 11 cases, orbital 9 cases, buccal subcutaneous tissue 5 cases, nasal cavity 4 cases.Conclusion the time-signal intensity curve of low or isointense MRI on T _ 2WI with bone destruction and stump bone sclerosis is a characteristic feature of sinusitis myofibroblastoma of nasal cavity and nasosinusitis.
【作者单位】：首都医科大学附属北京同仁医院放射科;
【基金】：北京市卫生高层次人才学科骨干资助项目(编号:2011-3-048)
【分类号】：R739.62;R445.2;R730.44

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