摘要
目的探讨良性色素性外周神经源性肿瘤(BMPNT)的影像学特征。方法选取经手术病理证实7例色素性外周神经源性肿瘤患者行CT和MRI扫描,分析其特征。结果7例BMPNT均为单发,其中神经鞘瘤6例、神经纤维瘤1例;位于颈部3例,椎管内2例、鼻腔和后纵隔各1例。5例CT平扫表现为边界清楚不均匀软组织密度影,其内3例合并钙化,增强扫描呈轻中度强化。7例肿块在MRI平扫均表现为混杂信号影,其内含有不同范围短T1短T2信号区,其在瘤内呈结节状、斑片状或弥漫性分布,3例瘤内合并囊变坏死呈长T1长T2信号;增强扫描肿块呈轻度至明显不均匀强化。结论外周神经源性肿瘤含有黑色素是一种少见现象,其MRI表现具有一定特征。
Objective To describe imaging features of the benign melanotic peripheral neurogenic tumors(BMPNT),and to improve the ability for the diagnosis and decrease in misdiagnosis.Methods The imaging materials of 7 patients with BMPNT confirmed pathologically were reviewed.Among them,5 cases underwent unenhanced CT scanning,3 of them were performed by enhanced CT scanning;7 cases were performed by unenhanced MRI scanning,5 of them by enhanced MRI scanning.Results All of 7 cases with BMPNT were singular,including 6 schwannomas and 1neurofibroma;of them,3 were located in the neck,2 in spinal canal,1 each in the nasal cavity and in the posterior mediastinum.On unenhanced CT images,5 masses presented well-defined,heterogenous,soft-tissue density,in which calcifications were found in 3 cases;they were slightly or moderately enhanced on enhanced CT scanning.On enhanced MRI images,all of 7 cases were heterogeneously,slightly to markedly enhanced.The nodular,patchy or diffusive short-T1 and short-T2-signal areas were found in the masses,3 of them presonted with intratumoral cystic and necrotic areas depicting short-T1-and long-T2 signal;5 masses were mildly to markedly,heterogenously enhanced on enhanced MRI scanning.Conclusion Melanin rarely occurs in the peripherial neurogenic tumors,and its MRI appearance has some characteristic.MRI combining with the predilection location is helpful to improve the diagnosis of BMPNT.
作者
李娴
张丽红
王林省
于昊
刘晓龙
王唯伟
王素
陈雨各
LI Xian;ZHANG Lihong;WANG Linsheng;Yu Hao;LIU Xiaolong;WANG Weiwei;WANG Su;CHEN Yuge(The Second Clinical Medical College of Jining Medical College, Jining 272067, P.R.China;Medical Imaging Center, Jining No.1 People’s Hospital, Jining 272013, P.R.China;Department of Medical Imaging, Affiliated Hospital of Jining Medical University, Jining 272029, P.R.China;Department of CT, People’s Hospital of Dingtao Region in Heze City, Heze 274100, P.R.China)
出处
《医学影像学杂志》
2021年第1期20-24,共5页
Journal of Medical Imaging
基金
山东省教育厅科技项目(编号:J11LF62)
山东省济宁市科技项目(编号:2013jnwk96)。
