The latest and most technologically advanced core needle breast biopsy technique, mammotomy (also referred to as directional vacuum-assisted biopsy), uses a probe that gently vacuums, cuts and removes tissue samples for testing. The advantages of mammotomy over other needle biopsy techniques include: (a) single insertion of the probe (b) the ability to fully remove many of the smaller lesions and (c) the ability to insert a 2 mm stainless steel marker at the biopsy site for future follow-up.