Prospective study found that peripheral lymph node sampling reduced the false-negative rate of sentinel lymph node biopsy for breast cancer

Table 4 FNR comparison before and after PLN sampling

No. of SLNs	No. of patients	FNR of SLNB (%)		χ² value		P value
No. of SLNs	No. of patients	Before PLN sampling	After PLN sampling	χ² value		P value
N = 1	158	19.6	4.3	5.059	0.024
N = 2	172	9.8	4.9	0.480	0.488
N = 3	130	7.3	4.9	<0.001	1.000
N ≥ 4	107	2.3	2.3	<0.001	1.000
Total	567	9.9	4.2	4.822	0.028

Abbreviations: FNR false-negative rate, PLN peripheral lymph node, SLNB sentinel lymph node biopsy, SLN sentinel lymph node, N number of SLNs

ISSN: 2523-3548