• 1. Department of Breast Surgery, Mianyang Central Hospital, Mianyang, Sichuan 621000, P. R. China;
  • 2. Department of Radiology, Mianyang Central Hospital, Mianyang, Sichuan 621000, P. R. China;
XU Weiyun, Email: 33199823@qq.com
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Objective To observe the accuracy of magnetic resonance imaging (MRI) for predicting pathologic complete response (pCR) after neoadjuvant chemotherapy (NAC) in breast cancer, and to analyze the cause of the prediction error.Methods Data from 157 breast cancer patients who underwent NAC before surgery in Mianyang Central Hospital from January 2017 to January 2019 were analyzed. MRI parameters before and after NAC and pCR conditions were collected to analyze the parameters that produced false positives and false negatives.Results Of the 157 patients, 37 (23.6%) achieved pCR after NAC, and 33 (21.0%) achieved radiation complete remission (rCR) after NAC. The accuracy of MRI prediction was 70.7% (111/157), the sensitivity was 82.5% (99/120), and the specificity was 32.4% (12/37). A total of 25 cases did not achieve rCR, but postoperative evaluation achieved pCR (false positive), 21 cases achieved rCR, but postoperative evaluation did not achieve pCR (false negative). Diameter of tumor, peritumoral oedema, and background parenchymal enhancement were associated with MRI false positive prediction (P<0.05); gland density and tumor rim enhancement were associated with MRI false negative prediction (P<0.05).Conclusion MRI can be used as an important method to predict pCR after NAC in breast cancer patients, and its accuracy may be related to diameter of tumor, peritumoral oedema, background parenchymal enhancement, gland density, and tumor rim enhancement.

Citation: ZHANG Jing, SONG Jun, XU Weiyun, ZHANG Xiaohong, ZHAO Lijuan. Accuracy of MRI in predicting pathologic complete response after neoadjuvant chemotherapy in breast cancer. CHINESE JOURNAL OF BASES AND CLINICS IN GENERAL SURGERY, 2020, 27(8): 975-979. doi: 10.7507/1007-9424.201909006 Copy

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