目的 研究肾上腺神经鞘瘤的MR影像表现。方法 病理证实的2例肾上腺神经鞘瘤，均进行了MR检查。分析肾上腺神 经鞘瘤的MR表现，包括大小，形状，边界，信号和增强特征，并与国内外文献报道的病例结合进行研究。结果 2例 均为女性，年龄分别为56及52岁。均为体检发现，无明显不适。MR平扫示肾上腺神经鞘瘤边界清楚，类圆形，T2WI 为不均匀稍高信号，T1WI为不均匀稍低信号，DWI为不均匀稍高信号，有囊性成分，1例有分隔。增强MR图像上，2 例动脉期都表现为轻度不均匀强化，门脉期和平衡期进一步强化。结论 肾上腺神经鞘瘤通常表现为单侧边界清楚 的肿块，有囊变，分隔及特征性的延迟强化模式。

Objective To analyse the magnetic resonance (MR) imaging features of adrenal schwannoma. Methods Two cases of adrenal schwannoma confirmed by histopathology were included in this study. Both patients had undergone MR examinations. The features of the adrenal schwannoma in the MR images were analysed retrospectively, including size, shape, margin, intensity and enhancement pattern. Results There were two female patients, with a age of 56 and 52 years, respectively. Both patients were diagnosed incidently, without any symptom. On unenhanced MR images, both cases of adrenal schwannoma were well circumscribed, rounded or oval, heterogeneous masses with cystic components in one case and septa in the other one. On enhanced MR images, both cases displayed mild heterogeneous enhancement of the tumour during the arterial phase, and progressive enhancement during the portal venous phase and equilibrium phase. Conclusion Adrenal schwannoma commonly presents as a well-defined unilateral mass with cystic degeneration, septa, and a characteristic progressive contrast-enhancement pattern on MR multiphase enhanced scans.