Hello and welcome to JustAnswer,
what was the reason they were ordered? is the trying to nurse and cannot?
To be honest with you I have not either. I don't think they will try again as the surgery will answer the questions that need to be answered. ie. what is this that they found on ultrasound? is it a polyp? if it is, is it invasive or cancerous. These, to be sure, are very concerning symptoms. And forced to venture a guess I would say that the polyp or mass or whatever is seen on the ultrasound may be putting pressure on the lactic ducts to the point that they are closed and this is probably why the galactogram failed on multiple attempts. Her prompt follow up, removal of this polyp, and the pathologists examination of it is critical and should happen as soon as possible.
I wish I had a snappy answer but the answer will come from the surgeon and pathologist.