If a mammogram shows a possible abnormal area, you may be asked to schedule an appointment for additional views or a breast ultrasound. If the finding can be seen with ultrasound, an ultrasound percutaneous needle biopsy may be performed. This is a quick procedure that involves only minor momentary discomfort. The biopsy usually can help to determind whether the finding is benign or malignant. If it is malignant, you will be referred to a breast surgeon.