It was an MRI. The radiologist said after considering what I had said about my original lesion - that is was not identified correctly at first because there was so little calcifications - that she changed what was planned to be a mammogram to a MRI.

Not said, but I suspect was also the case, they were watching that axillary lymph node (I didn’t know at the time that it was large) and it would not have appeared on the mammogram because of the location.

I do have dense breasts. My 2 year follow-up is a mammogram. But I will definitely be commenting during the scan and questioning them about spots that might not meet their criteria for calcifications.