目的 评价B超引导下核心针活检术（CNB）对不可触及的乳腺病变（NPBL）的诊断价值。方法 采用18G Tru-cut针结合活检枪对88例患者的96个NPBL行B超引导下CNB，并与切除活检病理结果比较。结果 NPBL大小4～23mm（平均13.1mm）。在CNB中，86个为良性，2个为可疑恶性，6个为恶性，2个取材不良。在切除活检中9个为恶性，87个为良性。CNB可疑恶变的2个NPBL均为恶性，1个恶性NPBL误诊为乳腺腺病，取材不良的2个NPBL均为良性。本组NPBL中恶性病变占9.38%（9/96），B超引导下CNB对NPBL的良恶性诊断正确率为98.94%（93/94），诊断乳腺癌的敏感性为88.89%（8/9），特异性为100%（8/8），良性病变的病理诊断符合率为97.70%（85/87），取材不良为2.08%（2/96）。结论 B超引导下CNB对NPBL的诊断具有较高的敏感性和特异性，结果准确可靠。
Objective To explore the differential diagnosis significance of 3.0T MRI united-sequences examination in the diagnosis of benign and malignant breast lesions. Methods A total of 67 breast lesions of 59 patients were collected prospectively, which be treated at the Sichuan Provincial People’s Hospital during July 2015 to January 2017. All patients were underwent bilateral breast 3.0T magnetic resonance plain scan, diffusion weighted imaging, and dynamic enhanced scan successively before surgical operation. Analysis of morphological features of the benign and malignant breast lesions, the time-signal intensity curve (TIC), the apparent diffusion coefficient (ADC), and the combination diagnosis of them were performed. Results Of all 59 patients, 67 lesions were confirmed by histopathology, including 18 benign lesions and 49 malignant lesions. The morphological features (including margin, shape, border, and evenness), the types of TIC of dynamic enhancement, and ADC value between the benign lesions and malignant lesions were statistically significant (P<0.05). The sensitivity and specificity of Fischer scoring system was 89.8% (44/49) and 61.1% (11/18) respectively. The sensitivity and specificity of TIC types was 83.7% (41/49) and 77.8% (14/18) respectively. The diagnostic threshold of ADC value was 1.012×10–3 mm2/s, with the sensitivity and specificity for the diagnosis was 91.8% (45/49) and 83.3% (15/18) respectively. The sensitivity and specificity of the combination of Fischer scoring system and TIC type for diagnosis between benign and malignant breast lesions was 95.9% (47/49) and 72.2% (13/18) respectively. The sensitivity and specificity of the combination of Fischer scoring system, TIC type, and ADC value for benign and malignant breast lesions was 98.0% (48/49) and 83.3% (15/18) respectively. Conclusion The combination of Fischer scoring system, TIC type, and diffusion-weighted imaging for the differential diagnosis between benign lesions and malignant lesions was more effective than single imaging method.