Background: Dual-energy contrast-enhanced spectral mammography (CESM) is one of the latest methods
for breast lesions characterization, where structural and functional (i.e., vascularization) assessment are
combined. Nowadays an interpretation of contrast-enhanced images is based only on the degree of contrast
enhancement, but we propose a more detailed assessment of the structure of the hypervascular lesions by
highlighting the contrast enhancement patterns.
Purpose: To evaluate the diagnostic performance of contrast-enhanced spectral mammography (CESM)
using the contrast enhancement patterns in malignant and benign lesions.
Material and Methods: Study included 332 women examined from February 2018 to June 2020. The mean
age of the women was 50 years. Of 428 lesions totally revealed, 172 (40.2%) were histologically verified
as malignant and 256 (59.8%) as benign. We proposed 9 types of contrast enhancement patterns to describe
lesions: reticular, granular, annular, diffuse-spherical, lacunar, cloud-like, heterogeneous-annular, point,
cotton-like.
Results: We showed that diagnostic performance of CESM increased sensitivity if an additional diagnostic
feature of contrast enhancement pattern was used: sensitivity increased from 79.7% to 94.8% (p = 0.26),
specificity from 82.4% to 95.3% (p = 0.013) and accuracy from 81.3 to 95.1% (p = 0.004), in comparison
with using of only one feature of contrast enhancement intensity in the differential diagnosis of malignant
and benign lesions.
Conclusion: Thus, using contrast enhancement pattern allows to increase the efficiency of CESM in breast
cancer detection.