成人小脑髓母细胞瘤的MRI特征分析  

MRI Characteristics of Cerebellar Medulloblastoma in Adults

作　　者：许跃根 赖凯璇 Xu Yuegen;Lai Kaixuan(Department of Imaging,Zhangzhou Hospital,Fujian Medical University,Zhangzhou,Fujian 363000)

机构地区：[1]福建医科大学附属漳州市医院影像科,福建漳州363000

出　　处：《现代医用影像学》2024年第7期1197-1200,共4页Modern Medical Imageology

摘　　要：目的:分析成人小脑髓母细胞瘤的MRI特征。方法:回顾性分析于我院诊疗的成人小脑髓母细胞瘤患者30例病历资料,2018年1月至2023年11月为病例入组时间,分析所有患者MRI影像资料,观察成人小脑髓母细胞瘤患者发病部位、形态特征、肿瘤大小、瘤周水肿、占位效应、囊变特点及信号特点。结果:肿瘤均位于小脑,15例位于左侧,9例位于右侧,6例小脑蚓部;17例圆形或类圆形,7例不规则型,小脑蚓部呈多发结节状3例及不规则片状3例。左右径×前后径×上下径为:2.2cm×1.4cm×2.1cm~6.3cm×3.8cm×5.1cm;13例无明显水肿,17例轻度-中度水肿。15例肿瘤内伴随囊变区,5例位于中央,10例位于肿瘤周边;30例成人小脑髓母细胞瘤患者中,19例成人小脑髓母细胞瘤患者T1WI呈稍低信号,3例成人小脑髓母细胞瘤患者等信号,8例成人小脑髓母细胞瘤患者混杂信号;T2WI呈等信号的有8例,稍高信号15例,混杂信号7例;3例FLAIR呈等信号,5例稍高信号;30例患者DWI均为高或稍高信号。MRI增强扫描:16例患者明显强化,8例中度强化,2例轻度强化,4例无强化。结论:成人小脑髓母细胞瘤患者高发部位为小脑半球,圆形、类圆形或不规则型,易产生囊变及水肿,MRI影像表现具有特征性,可为临床诊断提供参考。Objective:To analyze the MRI features of cerebellar medulloblastoma in adults.Methods:The medical records of 30 patients with cerebellar medulloblastoma treated in our hospital were retrospectively analyzed.From January 2018 to November 2023 as the time of enrollment,MRI imaging data of all patients were analyzed,and the site of onset,morphological characteristics,tumor size,peritumoral edema,space occupying effect,cystic degeneration and signal characteristics of adult cerebellar medulloblastoma patients were observed.Results:All tumors were located in the cerebellum,15 in the left side,9 in the right side,and 6 in the vermis.There were 17 cases of round or quasi-round,7 cases of irregular type,3 cases of multiple nodules and 3 cases of irregular flakiness in the vermis of the cerebellum.Left and right diameters×front and back diameters×upper and lower diameters are:2.2cm×1.4cm×2.1cm~6.3cm×3.8cm×5.1cm;There were 13 cases without obvious edema and 17 cases with mild to moderate edema.There were 15 cases with cystic lesion in the tumor,5 cases in the center and 10 cases in the periphery of the tumor.Among the 30 adult cerebellar medulloblastoma patients,19 patients with cerebellar medulloblastoma had slightly low T1WI signal,3 patients with cerebellar medulloblastoma had equal signal,and 8 patients with cerebellar medulloblastoma had mixed signal.There were 8 adult cerebellar medulloblastoma patients with equal signal on T2WI,15 with slightly higher signal and 7 with mixed signal.FLAIR was equal in 3 cases and slightly hyperactive in 5 cases.All the 30 patients had high or slightly high DWI signal.Enhanced MRI scans showed significant enhancement in 16 adult cerebellar medulloblastoma patients,moderate in 8 adult medulloblastoma patients,mild in 2 adult medulloblastoma patients,and no enhancement in 4 adult medulloblastoma patients.Conclusion:Cerebellar medulloblastoma occurs most frequently in adult cerebellar hemispheres,round or quasiround or irregular,which is prone to cystic degeneration and edema.The M

关 键 词：成人 小脑髓母细胞瘤 MRI特征 

分 类 号：R445.2[医药卫生—影像医学与核医学] R739.41[医药卫生—诊断学]