Can a Pen Be the Next Big Diagnostic Tool for Breast Cancer? LOVE LOVE LOVE THESE NEW DISCOVERIES.

@"Patti J" yes that seems to be the major reason - if margins are not clear - or I wonder if a little bit of say the cancer in breast or in lymph node is dropped during surgery.  You would THINK that ALL surgeons would ensure ALL of the cancer is removed but maybe hard to tell where it starts and ends during surgery.   I am sure they would have got it all this time Patti.