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目的:探讨超声图像的灰度直方图对三阴性乳腺浸润性导管癌(TN-IDC)与非三阴性乳腺浸润性导管癌(NTN-IDC)的鉴别诊断价值。方法:回顾性分析湖北省肿瘤医院2017年9月至2020年7月195例经病理证实的浸润性导管癌患者，根据术后免疫组织化学结果，将其分为TN-IDC组(44例)和NTN-IDC组(151例)，对其图像作超声灰度直方图分析，比较TN-IDC和NTN-IDC组患者直方图参数(包括均值、方差、偏度、峰度及第1、10、50、90、99百分位数)的差异。应用ROC曲线分析法计算鉴别诊断效能。结果:TN-IDC组的方差及第90、99百分位数明显低于NTN-IDC组，差异有统计学意义(均n P0.05)。方差在截断值为552.85时具有较高的准确性(78.5%)，此时敏感性、特异性、阳性预计值(PPV)、阴性预计值(NPV)及ROC曲线下面积(AUC)分别为75.0%、79.5%、51.6%、91.6%和0.829。第90百分位数在截断值为74时具有较高的准确性(60.0%)，此时敏感性、特异性、PPV、NPV及AUC分别为68.2%、57.6%、31.9%、86.1%和0.648。第99百分位数在截断值为107时具有较高的准确性(76.9%)，此时敏感性、特异性、PPV、NPV及AUC分别为75.0%、77.5%、49.3%、91.4%和0.772。n 结论:超声灰度直方图可为TN-IDC与NTN-IDC的鉴别诊断提供一定的参考价值，其中方差及第99百分位数具有较高的鉴别诊断价值。“,”Objective:To investigate the value of histogram analysis of ultrasound gray scale in differential diagnosis of triple negative breast invasive ductal carcinoma (TN-IDC) and non-triple-negative breast invasive ductal carcinoma (NTN-IDC).Methods:Totally 195 patients with invasive ductal carcinoma confirmed by pathology in Hubei Cancer Hospital from September 2017 to July 2020 were retrospectively analyzed.According to immunohistochemical results after surgery, 195 patients were divided into TN-IDC group (n n=44) and NTN-IDC group (n n=151). All cases were retrospectively analyzed to observe the ultrasonoscopy histogram features of tumors and obtain the histogram parameters, including mean, variance, skewness, kurtosis and percentile gray-scale values. The histogram parameters of TN-IDC were compared with those of NTN-IDC. The ROC curves were constructed to observe the efficiency of differential diagnosis.n Results:The values of variance, 90th and 99th percentiles in TN-IDC group were much lower than those in NTN-IDC group (all n P0.05). The optimal cutoff value for the accurate identification of TN-IDC and NTN-IDC groups was 552.85 for variance[sensitivity 75.0%, specificity 79.5%, positive predictive value(PPV) 51.6%, negative predictive value(NPV) 91.6%, accuracy 78.5%, and area under curve 0.829, respectively]. The optimal cutoff value for the accurate identification of TN-IDC and NTN-IDC groups was 74 for 90th percentile (sensitivity 68.2%, specificity 57.6%, PPV 31.9%, NPV 86.1%, accuracy 60.0%, and area under curve 0.648, respectively). The optimal cutoff value for the accurate identification of the two groups was 107 for 99th percentile (sensitivity 75.0%, specificity 77.5%, PPV 49.3%, NPV 91.4%, accuracy 76.9%, and area under curve 0.772, respectively).n Conclusions:Histogram analysis of ultrasound gray scale can provide certain value for the differential diagnosis of TN-IDC and NTN-IDC, the variance and 99th percentile values could perform better.