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Table 2 The criteria of lesions on CESM and MRI

From: BIRADS 4 breast lesions: comparison of contrast-enhanced spectral mammography and contrast-enhanced MRI

Characteristic of mass CESM MRI P value
Mean size 20.7 ± 1.3 mm 20.2 ± 1.6 mm 0.086
Contrast uptake
• Positive 46 (92%) 49 (98%) 0.168
• Negative 4 (8%) 1 (2%)
Degree of mass enhancement
• Faint 10 (21.7%) 12 (26.1%) 0.899
• Moderate 11 (23.9%) 10 (21.7%)
• Intense 25 (54.3%) 27 (58.7%)
Margin of mass
• Well defined 4 (8.7%) 7 (15.2%) 0.394

• Irregular
42(91.3%) 42 (91.3%)
The smallest size of detected lesion 5 ± 0.9 mm 3 ± 0.6 mm < 0.001
Number of lesions
• One lesion 41(89.1%) 42 (91.3%) 0.616
• More than one lesion 5 (10.9%) 7 (15.2%)
Non mass enhancement 6 (13.0%) 7 (15.2%) 0.860