Table 4.

Comparison of quantitative MRI features between benign and malignant morphologically-suspicious axillary lymph nodes (ALN).

	Benign ALN Mean (SD)	Malignant ALN Mean (SD)	p-value
Kinetic features
Peak enhancement %	398.7 (225.9)	440.6 (299.0)	0.63
Washout %	88.4 (12.8)	73.4 (20.9)	0.03*
Size
Angiographic volume (mm3)	3.2 (4.5)	1.8 (1.9)	0.68
Manual volume (mm3)	3.5 (5.9)	2.0 (1.7)	0.61
Maximum size (mm)	20.7 (9.9)	19.4 (5.2)	0.96
Minimum size (mm)	12.5 (5.3)	10.6 (3.2)	0.30
DW MRI features
Mean ADC (mm2/s)	1.03 (0.2)	1.01 (0.2)	0.62
Minimum ADC (mm2/s)	0.44 (0.2)	0.5 (0.2)	0.39

p-values calculated by Mann-Whitney U test

Abbreviations: DW = diffusion weighted, ALN = axillary lymph node, ADC = apparent diffusion coefficient

^*denotes statistically significant difference