目的探讨磁共振成像(magnetic resonance imaging，MRI)在卵巢囊腺瘤 诊断中的特征性表现，提高其诊断与鉴别 诊断能力，为临床术前评估提供较准确 的指导。方法 回顾性分析经手术病理证 实的38例卵巢囊腺瘤的MRI表现，包括其 MRI常规影像、弥散加权成像(Diffusion weighted imaging,DWI)及动态增强的影 像特征。结果 本组38例共50个病灶，浆 液性囊腺瘤16例共23个病灶，黏液性囊腺 瘤22例共27个病灶。良性表现为囊壁薄而 光整，囊内分隔薄而规则，T1WI低、等信 号，T2WI高信号，DWI呈高、低信号，信 号较均匀，增强扫描病灶未见强化；交 界性或恶性表现为囊实性混杂信号，囊壁 及囊内分隔厚而不规则，见囊壁结节呈乳 头状或不规则状，DWI呈高或混杂信号， 增强扫描见分隔与壁结节强化。与病理对 照，8例诊断有误差，1例黏液性囊腺瘤误 诊为单纯性囊肿，1例混合性黏液性囊腺 瘤误诊为畸胎瘤，6例交界性未作提示， 包括3例浆液性(含1例恶变者)、3例黏液 性。囊腺瘤的诊断率在94.7%(36/38)，良 恶性诊断符合率在84.2%(32/38)。结论 MRI成像能很好的显示卵巢囊腺瘤的形态 及信号特征，尤其DWI及增强扫描对卵巢 囊腺瘤的定性及鉴别诊断有较大优势，可 为临床治疗提供充分的影像依据。

Objective To investigate the characteristics of magnetic resonance imaging (MRI) in the diagnosis of ovarian cystadenoma and to improve the ability of diagnosis and differential diagnosis, and to provide accurate guidance for clinical preoperative evaluation. Methods MRI findings of 38 cases of ovarian cystadenoma confirmed by operation and pathology were analyzed retrospectively, including MRI conventional imaging, Diffusion weighted imaging (DWI) and dynamically enhanced imaging features. Results There were 50 lesions in 38 cases, 16 cases were serous cystadenoma with 23 lesions, 22 cases were mucinous cystadenoma with 27 lesions. The benign manifestations were thin and smooth wall, and thin and regular septa, T1WI showed low and equal signal, T2WI showed high signal, DWI showed high or low signal, the signal is uniform, with no enhancement. Borderline or malignant manifestation of cystic solid mixed signal, cyst wall and capsule separated thick and irregular, see the cyst wall nodules were papillary or irregular, DWI was high or mixed signal, enhanced scan see separation and wall junction Section enhancement. And compared with pathological results, 8casas of diagnosis error, 1 case of mucinous cystadenoma misdiagnosed as simple cysts, 1 case of mixed mucinous cystadenoma misdiagnosed as teratoma, 6 case of borderline without prompt including 3 cases of serous (including 1 cases of malignant transformation), 3 cases of mucinous. The diagnostic rate of cystadenoma was 94.7%(36/38), the coincidence rate of benign and malignant diagnosis was 84.2%(32/38). Conclusion MRI imaging can show the morphological and signal characteristics of ovarian cystadenoma, especially DWI and enhanced scan of ovarian cystadenoma have a great advantage in the qualitative and differential diagnosis, and providing adequate imaging basis for clinical treatment.