Hi, I had a mammogram then got a recall where I had further mammograms done as they had found calcification under the right nipple in one area. I then had the ultrasound and 3 biopsies taken.  Today the cancer nurse telephoned to say that they had not managed to get a large enough sample but the small amount that they tested was benign.  I was then asked to go back and have another ultrasound and further biopsies done next Wednesday.  I was relieved that what they were able to test was benign but I am now confused as to why they need to do more. 
Is this usual practice as I am now concerned.