Objective To investigate the value of ultrasonography in the diagnosis of breast ductal carcinoma in situ. Methods The ultrasound and molybdenum target X-ray data of 76 patients from January 2010 to January 2013 were retrospectively analyzed. Postoperative pathological results were compared postoperative pathological. The value of ul-trasonography in diagnosis of ductal carcinoma in situ of the breast was analyzed. Results In 76 patients proved by surgery and pathology, 48 cases were malignant tumor patients. 6 cases were misdiagnosed by ultrasonic examination,4 cases were misdiagnosed by molybdenum target X-ray examination. Two methods had no significant differeme (P>0.05). Conclusion Ultrasound and molybdenum target X-ray is a very good consistency in diagnosis of breast ductal carcinoma in situ. Ultrasound is of high clinical application value in the diagnosis of breast ductal carcinoma in situ.%目的：探讨超声在乳腺导管原位癌中的诊断价值。方法回顾性分析2010年1月~2013年1月在我院住院治疗的76例患者的超声和钼靶X线检查资料，检查结果与术后病理相对照，分析超声在乳腺导管原位癌中的诊断价值。结果术后病理证实76例患者中，恶性肿瘤患者48例。超声误诊6例，钼靶X线误诊4例，两种方法比较，差异无统计学意义(P>0.05)。结论超声与钼靶X线在乳腺导管原位癌诊断上有很好的一致性，超声在乳腺导管原位癌诊断中具有很高的临床应用价值。
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