I have heard of this happening but did not experience it myself. As I recall, a friend of a friend was the person to whom it happened and the oncologist wasn't terribly concerned. Someone else will have better information and I'll be curious to see the comments.

I was opposed to having a sentinel lymph node biopsy and only agreed to it the day before surgery. I am so glad that I had it now because, without those data points, my oncologists might have felt compelled to suggest very rigorous treatment in case the lymph nodes were already involved.

Clean lymph nodes and a very low OncotypeDX score helped me a lot in the decision process about treatment.