Role of short-term follow-up MRI in the detection of postoperative breast residual cancer / 实用放射学杂志

ABSTRACT

Objective To evaluate the role of short-term follow-up MRI in the detection of postoperative breast residual cancer. Methods A retrospective analysis was performed on 13 patients who were diagnosed as nonmalignant breast lesions by preoperative clinical and ultrasound and mammography examinations and intraoperative frozen pathology.However,these patients were finally confirmed as malignant breast lesions by paraffin pathology and received corresponding second operations.Routine MRI,DCE-MRI and EPI-DWI scan were performed on the 13 patients within one month after the first operation and these MRI features and patholo-gy were comparatively analyzed.Results All the cases showed local mammary architecture distortion both in routine MRI and DCE-MRI.The enhancement characteristics of the 13 cases were as follows:3 cases of stippled enhancement,4 cases of small nodular en-hancement,1 dendritic enhancement,1 network enhancement,1 ring-like enhancement of cystic wall and 3 cases of no abnormal en-hancement.The lesions of 7 cases showed type Ⅰ curve (progressive enhancement pattern)and 6 cases showed type Ⅱ curve (plat-eau pattern).The lesions of 6 cases showed decreased ADC value.In summary,there were 6 cases of tumor residue diagnosed by both MRI and the second pathology,while only 1 case of residual neuroendocrine carcinoma was misdiagnosed by MRI but confirmed by the second pathology.Conclusion Short-term follow-up MRI could be of value in determining postoperative breast residual tumor, and could be helpful for surgeons to make accurate operation plan.