摘要
目的研究小脑包膜期脓肿与囊性肿瘤的MRI特征,提高对小脑包膜期脓肿MRI诊断正确性。方法回顾性分析经48例小脑囊性肿病灶患者的影像及临床资料,其中小脑包默契脓肿11例;48例小脑囊性病变患者治疗前均接受了常规MRI平扫与增强及DWI检查,根据大囊小结节征、T2低信号环征、环形强化征(有或无附壁结节)、弥散高信号征、小灶大水肿征、流空血管征、伪足征和多房征共8种MRI特征性表现对所选病例进行比较分析。结果 T2低信号环征在小脑包膜期脓肿病例中100.0%出现,而其他囊性肿瘤病例均未出现;环形强化征在小脑包膜期脓肿病例和其他囊性肿瘤病例中出现的阳性率分别为100.0%和78.3%,但脓肿病例均属壁薄、无附壁结节形,而囊性肿瘤病例中的环形强化征壁厚薄不均,其中64.8%病例伴附壁结节。结论 MRI的特征性表现在小脑包膜期脓肿与囊性肿瘤的鉴别诊断中具有重要价值。
OBJECTIVE To study the MRI features of abscess and cystic tumor during the cerebellar envelope period so as to improve the accuracy of MRI in diagnosis of abscess during the cerebellar envelope period.METHODS The imaging and clinical data of 48 patients with cerebellar cystic swelling lesions,which included 11 cases with cerebellum package tacit abscess,were retrospectively analyzed.Before the treatment,all the 48 patients with cerebellar cystic lesions underwent the conventional MRI scan and enhanced DWI examination.A comparative study of the enrolled cases was performed according to eight MRI features including the large cyst and small nodules levy,T2 low signal ring sign,ring enhancement levy(with or without mural nodules),diffuse high signal levy,small focal edema levy,vascular flow void sign,pseudopodia sign,and multi-room levy.RESULTS T2 low signal ring levy emerged in 100.0% of the abscess cases during the cerebellar envelope period,and did no occur in any case with the cystic tumors;The positive rates of the ring enhancement levy in the cases with cerebellum capsule abscess and the cases with other cystic tumors were 100.0% and 78.3%,respectively,but the abscess cases were with thin wall and were without mural nodule shape.The cystic tumors cases were with uneven wall thickness of ring enhancement levy,in which 64.8% were complicated with mural nodules.CONCLUSION The MRI characteristic performance has great value in the differential diagnosis of the cerebellar capsule period abscess and cystic tumor.
出处
《中华医院感染学杂志》
CAS
CSCD
北大核心
2013年第5期1068-1070,共3页
Chinese Journal of Nosocomiology
关键词
小脑包膜期脓肿
小脑囊性肿瘤
磁共振成像
Cerebellar envelope period abscess
Cerebellar cystic tumor
Magnetic resonance imaging