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. Author manuscript; available in PMC: 2015 Apr 13.
Published in final edited form as: Cancer. 2010 Jun 15;116(12):2878–2883. doi: 10.1002/cncr.25066

Table 1.

Status of SLNs and Non-SLNs in Lymph Node-Positive Patients After Preoperative Chemotherapy

Lymph Nodes Negative Non-SLNs Positive Non-SLNs Total
Negative SLNs 26 13 39
Positive SLNs 14 33 47
Total 40 46 86

SLN indicates sentinel lymph node; TP, true positive; TN, true negative; FN, false negative.

False negative: FN/(TP + FN) =13/60 =22%; negative predictive value: TN/(TN + FN) =26/39 =67%.