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目的:探讨乳腺导管内乳头状瘤癌前病变的超声特征.方法:乳腺导管内乳头状瘤患者61例,其中癌前病变患者23例,非癌前病变患者38例,分析乳腺导管内乳头状瘤癌前病变的超声特征.结果:癌前病变结节最大直径、纵横比、阻力指数均明显大于非癌前病变结节,癌前病变结节的边界清晰率明显低于非癌前病变结节,癌前病变结节的微钙化率、导管扩张率均明显高于非癌前病变结节,非癌前病变结节的彩色血流频谱明显好于癌前病变结节,(P<0.05).诊断准确率为98.4%.结论:超声检查是乳腺导管内乳头状瘤癌前病变的有效诊断方法.“,”Objective To investigate ultrasonic characteristic of precancerous lesion of breast duct papilloma.Methods 61 patients with breast duct papilloma were selected.32 patients were precancerous lesion.38 patients were non precancerous lesion. Ultrasonic characteristic of precancerous lesion of breast duct papilloma was analyzed.Results Maximum diameter, aspect ratio, resistance index in precancerous lesion were bigger than non precancerous lesion. Boundary clarity in precancerous lesion was lower than non precancerous lesion. Micro calcification rate, catheter dilatation rate in precancerous lesion were higher than non precancerous lesion. Color doppler flow spectrum in non precancerous lesion was better than precancerous lesion. (P<0.05).Conclusion Ultrasonic inspection is effective diagnostic method in precancerous lesion of breast duct papilloma.