目的 探究星形胶质细胞瘤的MRI 征象，以提高术前诊断水平和指导临床 治疗。方法 回顾性收集我院 2014年3月 至2016年3月间经手术和病理证实的27例 星形胶质细胞瘤患者的临床资料、MRI表 现及病理结果，并进行分析与统计。结 果 27例均为颅内单发病灶，病灶最大直 径2.3cm-6.8cm，平均(3.51±1.73)cm， 病变部位为幕上16例、幕下11例；MRI平 扫囊实性肿块边界较清晰，实性部分或实 性壁结节T1WI呈等低信号，T2WI呈稍高信 号；囊性部分T1WI呈明显低信号，T2WI呈 明显高信号，增强扫描可见实性部分或 实性结节均明显强化；偏实性肿块边界清 晰，T1WI呈稍低信号，T2WI呈高信号，增 强扫描后明显强化；弥漫性星形细胞瘤病 变边界不清，异常信号或T1WI呈等低信 号，T2WI呈等高信号，扫描弥漫可见轻度 斑片状强化或无明显强化。结论 星形胶 质细胞瘤的MRI影像学征象明显，以囊实 性肿块、偏偏实性肿块为主，其MRI征象 可为星形胶质细胞瘤的临床诊断和治疗提 供参考依据。

Objective To explore MRI signs of astrocytoma, to improve preoperative diagnosis level and guide clinical treatment. Methods Clinical data, MRI features and pathological results of 27 patients with astrocytoma in our hospital from March 2014 to March 2016 confirmed by surgery and pathology were retrospectively collected, then analyzed and counted them. Results 27 cases were intracal solitary lesions, maximum diameter of lesions were 2.3cm-6.8cm, average diameter was (3.51±1.73)cm, diseased region were supratentorial in 16 cases, subtentorial 11 cases; MRI plain scan showed clear boundary in cystic and solid mass, solid part or solid mural nodule T1WI were low signal, T2WI were slightly higher signal; cystic part T1WI were obvious low signal, T2WI were obvious high signal, enhancement scanning showed solid part or solid nodule were obvious strengthening; partial solid mass had clear boundary, T1WI were slightly lower signal, T2WI were high signal, obvious strengthening occurred after enhancement scanning; diffusivity astrocytoma lesion had obscure boundary, abnormal signal or T1WI were low signal, T2WI were high signal, scan diffuse showed mild patchy strengthening or no obvious strengthening. Conclusion MRI imaging signs of astrocytoma are obvious, mainly in cystic and solid mass, partial solid mass, MRI signs can provide reference for the clinical diagnosis and treatment of astrocytoma.