少见部位颅内软骨瘤的影像特点  

Imaging features of intracranial chondromas at unusual locations

作　　者：张格[1] 王显龙[1] 王燕钰[1] 陈燕萍[2] 路世龙[1] 温志波[1] 

机构地区：[1]南方医科大学珠江医院放射科,广州510280 [2]南方医科大学南方医院影像诊断中心,广州510515

出　　处：《中华神经医学杂志》2012年第12期1251-1254,共4页Chinese Journal of Neuromedicine

摘　　要：目的总结少见部位的颅内软骨瘤的影像学特点。方法南方医科大学珠江医院和南方医院放射科自2010年2月至2011年4月共收治经手术和病理证实为大脑凸面及大脑镰颅内软骨瘤患者6例，其中大脑凸面3例，大脑镰区3例，回顾性分析其临床表现和影像学资料。结果患者CT显示肿瘤边缘清楚，5例可见数量不等钙化，相邻骨质受累2例；MRI显示病灶呈混杂信号，其中肿瘤实质部分呈长T1、长T2信号，钙化部分呈长T1、短T2信号，肿瘤出血为长T1、短T2信号；其中3例可见特征性的“皂泡征”；MRI增强扫描显示1例明显强化，3例轻度强化，2例无明显强化。结论发生于大脑凸面及大脑镰的颅内软骨瘤罕见，术前误诊率高。结合肿瘤体积较大、多发钙化、可见“皂泡征”、增强扫描无或轻度边缘强化等特征，可对其做出影像学诊断，但最终确诊仍需病理检查。Objective To discuss the imaging features of intracranial chondromas at unusuallocations. Methods Six patients with intracranial chondroma conformed by surgery and histopathology （3 lesions located at the convexity, and the others located at the falx cerebri）, admitted to our hospital from February 2010 to April 2011, were chosen in our study; their imaging features were retrospectively analyzed. Results CT scans showed obvious calcification and clear borders of the tumors in 5 patients, and the mixed attenuation and adjacent bone invasion in 2 patients. MRI scans demonstrated that the parenchyma of the tumors had hyperintense on T1WI and hyperintense on T2WI, and the calcified elements of the tumors had hyperintense on T1WI and hypointensity on T2WI; tumor bleeding lesions had hyperintense on T2WI and hypointensity on T1WI; the characteristic sign, ＂foamy sign＂, was found in 3 patients. Obvious inhomogeneous enhancement was observed in one and slight enhancement in 3 patients, while other two patients showed no enhancement. Conclusion Intracranial chondromas arising from the unusual locations is often misdiagnosed; combined imaging findings, including giant mass, and globular or diffuse calcification, can be helpful in the preoperative diagnosis.

关 键 词：颅内软骨瘤 磁共振成像 体层摄影术 X线计算机 

分 类 号：R445.2[医药卫生—影像医学与核医学]