There is a definite learning curve in SNB with higher non-detection rates and false negative rate in the earlier phases of the study compared to the later part. This learning curve is absent in axillary sampling, which requires no specialized training or expensive equipment and has a 100% detection rate. The mean number of sentinel nodes that were identified, as reported in various SNB studies, was 2.13 (with a range of mean numbers of SN dissected being 1.3-3.1). The actual range of number of sentinel nodes dissected was 1 - 8, which is quite comparable to the average 4 -5 nodes that are required to be sampled for accurately predicting the axilla. Badwe and Mittra have concluded that sentinel node biopsy is expensive and is driven by lure for technology and fashion, and has little advantage over axillary node sampling in predicting a negative axilla.