摘要
目的：探讨颅内毛细胞型星形细胞瘤（PA）的MRI特征，以提高对此病的认识。方法：回顾性分析本院经手术病理证实的18例PA的MRI平扫及增强资料。结果：位于中线结构9例（视神经及视交叉5例，脑干2例，下丘脑1例，第四脑室1例），小脑5例，大脑半球4例。病灶最大径为2.1~5.9cm。在影像上，10例呈实性，伴囊变、坏死或微囊形成，实质不规则明显强化；8例呈囊实性，壁结节和囊壁均明显强化4例，壁结节明显强化、囊壁无强化3例，壁结节和囊壁均轻度强化1例。瘤周无水肿13例，瘤周轻度水肿5例。结论：PA的MRI表现有一定的特征性，结合临床资料有助于术前诊断，同时对其治疗有重要的参考价值。
Abstract
Objective: To investigate the MRI features of intracranial pilocytic astrocytoma(PA) to further enhance the understanding of the disease. Methods: The pre-and-post contrast MR images of 18 cases of pathologically confirmed PA were analyzed retrospectively. Results: Of the 18 PA, 9 located in the midline structure(5 in the optic chiasm, 2 in the brainstem, 1 in the hypothalamus and 1 in the fourth ventricle), 5 in the cerebellum and 4 in the cerebral hemisphere. The size of lesions ranged from 2.1cm to 5.9cm. On MRI, 10 cases were predominantly solid mass with cystic degeneration or necrosis or micro-cystic components, all had markedly inhomogeneous enhancement; Eight cases were solid-cystic mass, 4 with intensely enhancing mural nodule and cystic wall, 3 with intensely enhancing mural nodule and non-enhancing cystic wall and 1 with mildly enhancing mural nodule and cystic wall. Thirteen cases showed no obvious peritumoral edema and 5 showed slight peritumoral edema. Conclusion: The MRI appearance of PA has some characteristics. According to the clinical manifestations, it is helpful for accurate preoperative diagnosis. Meanwhile, it also offers significant reference value for treatment.
关键词
星形细胞瘤 /
脑肿瘤 /
磁共振成像
Key words
Astrocytoma /
Brain neoplasms /
Magnetic resonance imaging
阎 静;成官迅;朱晓军;刘国顺;虞康惠;张 刚.
颅内毛细胞型星形细胞瘤的MRI诊断[J]. 中国临床医学影像杂志. 2011, 22(6): 381-384
YAN Jing;CHENG Guan-xun;ZHU Xiao-jun;LIU Guo-shun;YU Kang-hui;ZHANG Gang.
MRI diagnosis of intracranial pilocytic astrocytoma[J]. Journal of China Clinic Medical Imaging. 2011, 22(6): 381-384
中图分类号：
Ｒ739.41
Ｒ730.264
Ｒ445.2
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