摘要
目的分析非中线髓母细胞瘤的MRI表现,以提高对其的认识。方法回顾分析16例经病理证实的非中线髓母细胞瘤的临床及MRI资料,分析肿瘤的位置、形态、信号、增强特性等表现。结果 16例均为单发肿瘤,未见播散转移灶。其中小脑半球13例,桥小脑角区3例。13例肿瘤呈不规则形,可见分叶,3例呈类圆形。14例肿瘤与小脑边界较清楚。瘤周水肿以轻度水肿为主或无水肿带。T1WI瘤体呈等、低信号,T2WI呈等、稍高信号,13例发生囊变,以多发小斑点片、裂隙状为主,单发大片状囊变仅为1例。增强扫描肿瘤以中、重度明显强化为主,强化方式多样。16例肿瘤未见出血灶、钙化灶。结论非中线髓母细胞瘤是颅内少见的肿瘤,MRI表现具有一定特征,对于诊断非中线髓母细胞瘤具有一定价值。
Objective To improve the diagnosis of non-midline medulloblastoma by analyzing its MRI features. Methods The clinical data and MRI imaging of 16 cases with non-midline medulloblastoma pathologically proved were retrospectively reviewed, and the location, shape, signal, enhancement pattern of non-midline medulloblastoma were analyzed. Results 16 cases were all single tumors with no disseminated metastases. 13 cases were found in cerebellar hemisphere and 3 cases in cerebdlopontine angle. 13 cases was irregular in shape with sublobe, 3 cases were round. 14 cases presented with well defined margins between cerebellar, with mild peritumoural edema or no edema. On MRI images,tumor appeared as low or isointensity on T1WI and slight high or isointensity on T2WI. 13 cases with cystic occurred and mainly as small spots or slit-like, only 1 case presented with single large cystic. Enhancement pattern of medulloblastoma was variable, which mainly ranged from moderated to marked. 16 cases had no hemorrhage or calcification. Conclusion Non-midline medulloblastoma is an uncommon tumor of the brain. MR imaging has some specificity that is helpful to the diagnosis of non-mid- line medulloblastoma.
出处
《医学影像学杂志》
2013年第5期661-664,共4页
Journal of Medical Imaging
关键词
非中线
髓母细胞瘤
磁共振成像
Non-midline
Medulloblastoma
Magnetic resonance imaging
