Table II.

Diagnosis of sentinel lymph node metastases.

A. Postoperative diagnosis
Postoperative diagnosis	SLN or non-SLN-positive	SLN and non-SLN-negative	Total
SLN-positive	54	0	54
SLN-negative	2	47	49
Total	56	47	103
B. Intraoperative diagnosis
Intraoperative diagnosis	SLN-positive	SLN-negative	Total
SLN-positive	54	0	54
SLN-negative	8	300	308
Total	62	300	362

Postoperative diagnosis: The sensitivity for sentinel lymph node (SLN) metastasis was 96.4%, the specificity was 100% and the false-negative rate was 3.6%. Intraoperative diagnosis: A diagnostic accuracy of 97.8%, a sensitivity of 87.1% and specificity of 100% were achieved with hematoxylin and eosin (H&E) staining in the frozen sections; the false-negative rate was 12.9%.