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. 2021 Sep;10(9):2600–2607. doi: 10.21037/gs-21-415

Table 3. Positive lymph nodes and false negative rate.

Lymph nodes rate Total (N=456) PSN (N=444) PSN + ASN (N=444) NSABP B-32
Positive nodes (pN+) rate 32.7% (149/456) 28.5%
Positive nodes in SLN biopsy rate 32.4% (144/444) 29.5% (131/444) 30.9% (137/444) 26%
   False negative rate 9% (13/144) 4.9% (7/144) 9.8%
   Sensitivity 91% (131/144) 95.1% (137/144) 91.2%
   Negative predictive value 95.8% (300/313) 97.7% (300/307) 96.1%
Micrometastases 26 24 24

PSN, principal sentinel lymph nodes; ASN, accessory sentinel lymph nodes.