Table 3. Increment sensitivity of SLN analysis for breast cancer metastases.

	Frequency of positive SLN	Percentage of positive SLN (%)	P-value *
H&E	6	20
IHC	8	26.7	<0.01
NY-BR-1	13	43.3	<0.01
CK-19	8	26.7	<0.01
MGB-2	11	36.7	<0.01
3 markers	7	23.3	<0.01
2 markers	10	33.3	<0.01
1 marker	15	50.0	<0.01

^*Fisher's exact test two-tailed P-value (compared to H&E alone).

SLN=sentinel lymph node; H&E=haematoxylin and eosin stain; IHC=immunohistochemistry stain for cytokeratin.