DCIS - Breast marker missed in initial surgery

I reckon 1cm in relation to however large your breast is, would equate to an airline pilot flying from London to Sydney and landing in Brisbane. "Well I got close...considering I flew so many thousands of miles....at least I hit the right continent...the right side of the continent at that. Please fly XYZ Airlines next time you wish to travel...." Personally, I would get a second opinion. For goodness sake, he had a marker to aim for...more than just a... texta X... marks the spot.