Table 1.
Clinicopathologic characteristics of all patients.
Fig 1.
Representative case of positive DWI rim sign.
Diffusion weighted image (b = 750 s/mm2) shows a complete high signal rim surrounding the right breast mass.
Fig 2.
A 41-year-old woman with triple-negative cancer in the right breast (poorly differentiated grade, high Ki-67 index, and high ADC kurtosis).
Fat-suppressed contrast-enhanced T1-weighted imaging (a) shows an irregular rim-enhancing mass (arrow). A DWI (b = 750 s/mm2) (b) shows positive rim sign (arrow). DWI slice of tumor volume reconstruction of ADC values (c) and a histogram map (d) are shown. ADC mean; mode; and 25th, 50th, and 75th percentiles were 1.099, 0.745, 0.859, 1.075, and 1.245 x 10−3 mm2/s, respectively. The ADC skewness and kurtosis were 1.59 and 4.28, respectively. The 3-cm-sized tumor had a poor histologic grade and high Ki-67 index (50%).
Fig 3.
A 45-year-old woman with ER-positive cancer in the right breast (well differentiated grade, low Ki-67 index, and low ADC kurtosis).
Fat-suppressed contrast-enhanced T1-weighted imaging (a) shows an irregular heterogeneously enhancing mass (arrowhead). An ADC map (b) shows positive rim sign (arrow). DWI with tumor volume reconstruction of ADC values (c) and a histogram map (d) are shown. ADC mean; mode; and 25th, 50th, and 75th percentiles were 0.653, 0.389, 0.414, 0.603, and 0.908 x 10−3 mm2/s, respectively. The ADC skewness and kurtosis were 0.14 and -1.39, respectively. The 2-cm-sized tumor had a well-moderate histologic grade and low Ki-67 index (10%).
Table 2.
Clinicopathologic associations between triple-negative and ER-positive breast cancers.
Table 3.
Associations of MRI features between triple-negative and ER-positive breast cancers.