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目的：探讨乳腺良、恶性肿瘤的二维和彩色多普勒超声的特征性改变，提高良恶性肿块鉴别诊断的准确性。方法对经手术病理证实的40例乳腺良恶性肿瘤患者的二维超声图像与彩色多普勒血流图像(CDFI)特点进行总结、分析。结果乳腺恶性肿瘤形态不规则，边界不清呈毛刺状、肿块后方回声衰减、腋窝淋巴结肿大、病灶内微小钙化点与穿支血管等所出现的比率明显高于乳腺良性肿瘤。结论超声检查对乳腺良恶性肿瘤的鉴别诊断有重要价值，如肿块中探查到微小钙化点/穿支血管，常提示乳腺癌。“,”Objective: To evaluate the features of high frequency ultrasonography and color Doppler ultrasonography in benign and malignant breast tumor in order to promote the diagnostic accuracy. Methods: We analyzed the characteristics of two dimensional ( 2D) ultrasound and color Doppler flow imaging(CDFI) in 40 cases with breast soildary masses which were pathological y approved. Results: Ultrasonographic appearances of malignant breast lesions had irregular shape,speculated margins,microlobularity, microcalcification and reveal blood flow. Ultrasonographic appearances of benign breast lesions had regular shape,circumscribed margin ,thin echogenic capsule and few blood flow. Conclusion: The ultrasound is of great value in differential diagnosis of breast lesion, Micro - calcification and perforating vessels in breast mass strongly suggested the diagnosis of breast cancer.