Until recently, a woman with a nonpalpable lesion detected on mammogra
phy had to undergo the emotional and physical trauma of surgical excis
ion. However, a new technique, percutaneous core needle biopsy, guided
by digital three-dimensional x-ray imaging, offers a reasonable alter
native to standard surgical biopsy. This method produces no pseudolesi
ons, subjects the patient to less physical and emotional trauma, is do
ne on an outpatient basis with local anesthesia, and costs far less th
an the surgical method.