桥小脑角区胆脂瘤的磁共振弥散加权成像

目的 探讨MR-DWI检查对桥小脑角胆脂瘤的诊断价值。方法 回顾性分析我院13例经手术和病理证实的桥小脑角区胆反映瘤患者的磁共振平扫、增强和DWI图像的特征。结果 所有病变均以累及桥小脑角为主，病灶为类圆形或不规则开有，沿蛛网膜下腔生长，7例包埋基底动脉，平扫8例以与脑脊液一致长T1WI，T2WI为主，5例为混杂信号；病灶无强化及灶周水肿；DWI典型表现为病灶范围内高信号，结论 桥小脑角的胆脂瘤在MR-DWI图像上有特征表现。MR-DWI检查有助于桥小脑角区胆脂的诊断和鉴别诊断。

Role of MR-diffusion weighted image in diagnosing cholestentoma in cerebellopontine angle

Objective To explore Role of MR-diffusion weighted image in diagnosing cholestentoma in cerebellopontine angle (CPA). Methods 13 patents with cholestentoma proved by surgical and pathological examination were retrospectively reviewed with their data collected from plain and enhanced scan of MRI, and DWI. Results All lesions mainly involved CPA, displaying subround or irregular shapes, running along subarachnoid space. Basilar arteries were encapsulated in 7 lesions. 8 cholestentomas that underwent plain scan showed long T2WI and long T1WI signal similar to CSF in intensity, 5 lesions showed confounding signals, free from enhancement of lesions and edema around lesions. Hyperintensity within area of lesion was characteristic for DWI. Conclusion Cholestentoma in CPA shows characteristic manifestations on MR-DWI, enabling it to be diagnosed and differentiated.