Table 5: Number of patients with micro-metastasis (macro-metastasis-negative nodes stained with CK-22) in different node groups.

Pre-operative evaluationLower LN Group Upper LN groupPost-operative evaluation
SLNNon-SLN

LNMM (−)3441295028
LNMM (+)191224325
Number of samples5353535353

LNMM (−): micro-metastasis negative; LNMM (+): micro-metastasis positive; SLN: sentinel lymph nodes group; non-SLN: non-sentinel lymph nodes group.