摘要
目的:探究小儿后颅窝肿瘤临床及磁共振(MR)特点与误诊原因。方法:回顾分析被误诊的后颅窝肿瘤60例患儿MR和临床资料。结果:18例星形细胞瘤,MR平扫T2WI为混杂信号、T_1WI等低信号为主,3例完全囊变、12例可见囊性变;30例髓母细胞瘤,MR平扫以T2WI为稍高信号或者等信号、T_1WI低信号为主,其中病灶内信号呈不均匀的有10例,可见多个小囊变去病变边缘。12例室管膜瘤,MR平扫以T2WI有块影且为高信号,部分信号表现为不均匀,T_1WI低信号为主,所有患者均伴有明显的梗阻性脑积水;MR检查可较好的显示肿瘤形态信号特点及其大小,且准确性优于普通CT。结论:MR扫描小儿后颅窝肿瘤后表现具有一定的特征性,对定性诊断和定位肿瘤有较好的临床应用价值;误诊的主要原因为患儿体征、症状不典型和行头颅MR检查不及时。
Objective To explore the clinical and MR features of posterior cranial fossa tumors in children and to explore the causes of misdiagnosis. Methods ： A retrospective analysis of the clinical data of 60 cases of posterior cranial fossa tumors was done. Results ： 18 cases were diagnosed as astrocytoma, and MR scan showed mainly T2WI mixed signal and T1WI low signal; 3 cases had complete cystic degeneration and 12 cases were found with cystic degeneration; 30 cases were obser^^ed with medulloblastoma, and MR scan showed T2WI slightly high signal or other signals, wherein the signals of lesions were not unifor^n in 10 cases, and multiple cystic- lesions to the edge could be found; 12 cases were suffered from ependymoma, MR scan showed T2WI mass shadow and high signal, and part signal performance was not uniform and mainly the low signal in T1WI. All patients were significantly associated with obstruc-tive hydrocephalus. MR examination showed morphological characteristics of tumor size and better signal, and the accuracy was better than ordinary CT. Conclusions： MR scan shows certain characteristics of the tumors of posterior cranial fossa in children, and has a good clinical value in qualitative diagnosis and localization of tumors. The main reasons for misdiagnosis are atypical symptoms and signs as well as late head MR examination.
出处
《中国民康医学》
2017年第8期17-17,57,共2页
Medical Journal of Chinese People’s Health
关键词
后颅窝肿瘤
MR
Posterior fossa tumor
MR
