Dear KATBIRD: Microcalcifications are small calcium deposits found within the breast tissue. There are different types of microcalcifications, and based on their pattern on the mammogram it gives the radiologist clues as to their cause. For instance microcalcifications that are more scattered are probably due to a benign (non-cancerous) cause, a
"Underlying tumor" Is that one that is not seen or something?
Also, can lumps be oval and smooth or are they round feeling?