Predicting response to neo-adjuvant chemotherapy and assessment of residual disease in breast cancer using contrast-enhanced spectral mammography: a combined qualitative and quantitative approach

Egyptian Journal of Radiology and Nuclear Medicine

Table 2 Results review

	Number	Percentage
Baseline patterns of contrast uptake
– Solitary Lesion	26/81	32.1
– Grouped lesion	13/81	16
– Separated lesion	32/81	39.5
– Replaced lesion	10/81	12.4
Post-NAC shrinkage patterns
– Type I (concentric)	24/81	29.6
– Type II (concentric with surrounding lesions)	15/81	18.5
– Type III (residual multi-nodular)	9/81	11.1
– Type IV (diffuse enhancement)	9/81	11.1
– No residual lesion (complete response)	20/81	24.75
– No appreciable change (stationary course)	4/81	4.95