Table 4. Summary of prospective studies of sentinel node biopsy after neoadjuvant chemotherapy in cN+ axilla.

	ACOSOG Z1071 [73]	SENTINA [74]	SN FNAC [75]
Design	Single arm	4 Arms	Single arm
No. of patients	756	Arm C (592)	153
Patient population	T0-4, N1-2, M0	N1-2, M0	T0-3, N1-2
SLN identification rate (%)	92.9	80.1	87.6
False negative rate (%)	12.6	14.2	9.6
2 SLNs	21.1	18.5	4.9 ( ≥ 2 SLNs)
3 SLNs	9.1	7.3	-
Dual tracer technique	10.8	8.6	5.2
Inclusion of ypN0(i+)	8.7	-	8.4

SLN=sentinel lymph node.