Magnetic resonance imaging and ultrasonography in predicting infiltrating residual disease after preoperative chemotherapy in XXXX .

@entity1 @entity0 @entity41 @entity5 @entity1558
BACKGROUND: This study was designed to evaluate the accuracy of breast magnetic resonance imaging (MRI) and ultrasonography (US) in predicting the extent of @entity1558 after preoperative chemotherapy. METHODS: @entity1 with stage II-III invasive @entity0 who received preoperative chemotherapy and were imaged with post-treatment MRI were included. Histopathological verification was available for all @entity1 . The longest diameter of @entity41 measured with MRI and US has been compared with the infiltrating @entity41 size at pathologic evaluation. RESULTS: A total of 108 @entity1 were enrolled: 59 were imaged with both MRI and US (MRI group), and 49 were imaged with US only (non-MRI group). The non-MRI group was enrolled as an external control to avoid possible bias in the selection of @entity1 . In the MRI group, the means of the deltas between MRI @entity41 size and pathologic size and between US and pathologic size were 0.16 cm and -0.06 cm respectively (P = not significant). Overall, a discrepancy limited in the interval from -0.5 cm to +0.5 cm compared with the pathologic size was observed in 54% and 51% of the @entity1 with MRI and US, respectively (P = not significant). The linear correlation between the radiological measurement and pathologic @entity5 size was r = 0.53 for MRI and r = 0.66 for breast US. In the non-MRI group, the mean of the deltas between US @entity41 size and pathologic size was 0.06 cm, and the linear correlation was r = 0.79. CONCLUSIONS: In this series of @entity1 , MRI and US do not show significant differences in predicting the breast residual infiltrating @entity5 after preoperative chemotherapy.
