Table 5.

Comparison of intra-individual normalized quantitative MRI features between benign and malignant morphologically-suspicious axillary lymph nodes (ALN). All values are ratios of suspicious ALN-to-contralateral normal ALN, and thus there are no units.

	Benign ALN Mean (SD)	Malignant ALN Mean (SD)	p-value
Kinetic feature ratios
Peak enhancement	1.43 (1.3)	2.0 (2.4)	0.26
Washout	1.12 (0.3)	1.11 (0.5)	0.96
Size Ratios
Angiographic volume ratio	1.17 (1.6)	1.05 (1.2)	0.77
Manual volume ratio	4.96 (5.0)	9.38 (16.4)	0.15
Maximum size	1.52 (0.7)	1.91 (1.3)	0.39
Minimum size	1.95 (0.7)	1.99 (0.8)	0.93
DW MRI Feature Ratios
Mean ADC ratio	0.95 (0.2)	0.90 (0.2)	0.40
Minimum ADC ratio	0.70 (0.4)	0.85 (0.8)	0.99

p-values calculated by Wilcoxon rank-sum test

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