To evaluate the diagnostic accuracy of ultrasonographically (US)-guided 14-gauge core-needle biopsy (CNB) for benign papilloma without atypia and to determine whether clinical and radiologic features could be used to predict an upgrade to malignancy.
Department of Radiology, Research Institute of Radiological Science, Yonsei University College of Medicine, Shinchon-dong 134, Seodaemun-ku, Seoul 120-752, South Korea.