Yes, today's testing is certainly more aggressive and better. You didn't say when you took your mom for treatment, etc., but I am assuming it was a good while ago and there are big changes in treatment and surgery today. In 1969 I had a lump, was put in the hospital immediately, had a lumpectomy and stayed for five days even when it was benign. Today they do needle biopsies to see if the lump is benign and if it is let it go. Sometimes chemo is done before surgery today to shrink the lump. The sonogram has been added as a testing tool because your breasts are more dense and lumps are sometimes hard to find in mammos. I can assure you that your wife's doctors are doing things in a good order and sound like they will take good care of her.
Prayers and best wishes for the New Year to be good for you,