摘要
目的分析颅内毛细胞型星形细胞瘤的MR特点及病理表现,提高对本病的MR认识。方法回顾性分析经病理证实的17例毛细胞型星形细胞瘤的MR表现,并与病理对照分析。结果所有病例均为单发,位于左侧小脑半球4例,右侧小脑半球4例,小脑蚓部3例,额叶4例,顶叶2例。单囊结节型10例(58.9%),壁结节T1WI呈低信号,T2WI及T2-FLAIR均呈高信号,增强明显强化,囊液T1WI呈低信号,T2WI及T2-FLAIR呈高信号,增强囊壁无强化或轻度强化。多囊结节型4例(23.5%),囊壁及分隔增厚,增强明显强化;囊性成分及结节信号与单囊结节型类似。囊实性型3例(17.6%),实性部分T1WI呈低信号,T2WI及T2-FLAIR高信号为主,增强明显强化。DWI瘤结节及实性瘤体均呈等或低信号。较大结节或实性瘤体信号不均,内见多发小囊变区,呈"囊中有瘤,瘤中有囊"的特征性表现。本组病例种中5例(29.4%)合并出血,4例(23.6%)合并瘤周轻度水肿。结论毛细胞型星形细胞瘤的MR有一定特征性表现,加深认识,可提高术前诊断率。
Objective Analyze the MR features and pathological features of intracranial pilocytic astrocytomas,and increase the awareness of MR in this disease.Methods Retrospective analysis of pathologically confirmed 17 cases of hair cell astrocytoma MR manifestations,and pathological control analysis.Results All the cases were solitary,located in the left cerebellar hemisphere in 4 cases,right cerebellar hemisphere in 4 cases,cerebellar vermis in 3 cases,frontal lobe in 4 cases,parietal lobe in 2 cases.10 cases of single cystic nodule type (58.9%),that T1WI showed hypointensity,T2WI and T2-FLAIR showed hyperintensity,with obvious enhancement,cystic containment T1WI showed hypointensity,T2WI showed hyperintensity,T2-FLAIR showed hyperintensity,capsule wall showed no enhancement or slight enhancement.4 cases of polycystic nodule type (23.5%),the cyst wall and septum were thickened and enhanced obviously,and the cystic components and signal intensity of the nodules were similar to those of the single cystic nodule type.3 cases of cystic solid type (17.6%),the solid part of T1WI showed hypointensity,T2WI and T2-FLAIR showed hyperintensity,and obviously enhanced.The nodules and solid tumors of DWI were iso-or hypointensity.The signals of large nodules or solid tumors were inhomogeneous,with multiple small cystic zone within the lesions.The characteristics were characterized by "tumor in the capsule and capsule in the tumor".In this group,5 cases (29.4%) with hemorrhage and 4 cases (23.6%) were associated with mild edema around the tumor.Conclusion MR of pilocytic astrocytoma has a certain characteristic performance,deepen understanding,can improve the preoperative diagnosis accuracy.
作者
赵梓霖
黄聪
罗军德
黎成
王文斌
张恒胜
ZHAO Zi-lin;HUANG Cong;LUO Jun-de(Department of Radiology,No.926 Hospital,Joint Logistics Support Force of PLA,Kaiyuan 661699,Yunnan Province,China)
出处
《中国CT和MRI杂志》
2020年第9期43-46,F0003,共5页
Chinese Journal of CT and MRI
关键词
毛细胞型星形细胞瘤
颅内
磁共振成像
病理
Pilocytic Astrocytoma
Intracranial
Magnetic Resonance Imaging
Pathology
