中文摘要：

目的：分析63个乳腺肿瘤的磁共振表现，探讨病灶邻近血管征（AVS）在乳腺良恶性肿瘤鉴别诊断中的价值。材料与方法：回顾性分析经病理证实的60例63个乳腺肿瘤的MR动态增强图像，在工作站获得剪影图像及3DMIP图像，分析病灶邻近血管征与病灶良恶性、病灶大小的关系。结果：血管征在恶性肿瘤出现率（55％）明显高于良性肿瘤出现率（26．09％），差异有统计学意义（χ2=4．944，P〈0．05）。病灶平均直径与血管征有关，病灶直径〉2cm的出现率（65．52％）明显高于直径≤2cm的出现率（26．47％），差异具有统计学意义（χ2=9．664，P〈0．05）。血管征分3型，单支血管型17例，其中恶性12例，良性5例；多支血管型7例，其中恶性6例，良性1例；血管扩张型4例，均为恶性。血管征诊断乳腺癌的敏感性为55．0％，特异性73．91％，阳性预测值78．57％，准确度61．90％。结论：血管征在鉴别诊断中有较高价值，表现为多支血管及扩张血管征时高度提示恶性；血管征可以作为乳腺癌多因子评估的有力补充。

英文摘要：

Purpose： To investigate the MR imaging of 63 lesions and to evaluate the role of Adjacent Vessel Sign （AVS） for differentiating benign from malignant breast lesions. Materials and Methods： Dynamic contrast-enhanced MR breast scan of 60 patients （63 lesions） with histopathologically confirmed were evaluated retrospectively. The subtraction and 3D -MIP images were analyzed in MR work station. To verify the values of AVS and assess correlation between AVS and lesions sort, lesion size. Results ： The AVS was significantly associated with malignancy than benign lesions （ P 〈 0. 05 ） , lesions 〉 2 cm more often presented with an AVS than did those lesions 〈 2cm （ P 〈 0. 05 ） ; The AVS included 3 types, type I was one vessel included 17 lesions of 12 malignant and 5 benign lesions; type II was multi-vessels , with 6 malignant and 1 benign lesions; type III was dilated- vessel, all 4 lesions were malignant. The sensitivity and specificity of AVS were 55. 0% and 73.91%, the positive predictive value was 78.57%, accuracy was 61.90%. Conclusion： the AVS has high accuracy in differentiating benign from malignant breast lesions, especially multi-vessels or dilated-vessels were seen. AVS can be used to additional common practice of breast MR.