Real-time ultrasound elastography in 180 axillary lymph nodes: elasticity distribution in healthy lymph nodes and prediction of breast cancer metastases

Table 3 Predominant color of the medulla in sonoelastography with respect to healthy and metastatic LNs

Medulla	Group 1 Healthy LNs n=165	Group 2 Metastatic LNs n=15	p (pairwise comparison)
red (soft)	0%	0%	n.a.
yellow	3.0%	6.7%	n.a.
green	15.8%	33.3%	n.a.
turquoise	73.9%	53.3%	n.a.
blue (hard)	7.3%	6.7%	n.a.
p-value (multivariate analysis)	n.s. (0.281)

There is no difference between the two groups. (n.s. = not significant, n.a. = not applicable as the multivariate analysis was negative, LN = lymph node).