Imaging-histological discordance after sonographically guided percutaneous breast core biopsy

Abstract

Background: The objectives of this study were to determine the frequency of imaging-histological discordance and to compare the frequency of carcinoma between discordant lesions at ultrasound (US)-guided core needle biopsy. Materials and Methods: From November 2009 to June 2012, we performed US-guided 14-gauge core needle biopsies on 989 breast lesions in 961 women. We reviewed 58 (5.8%) cases that had imaging-histological discordance after percutaneous breast biopsy and underwent subsequent excisional biopsy. The clinical, radiological, and histological findings were reviewed for those 58 cases. Results: Among the 58 cases, subsequent excisions revealed 16 (27.5%) malignancies, which were categorized as 9 (15.5%) invasive ductal carcinomas, 4 (6.9%) malignant phyllodes tumors, and 3 (5.1%) ductal carcinomas in situ. Conclusion: The malignancy rate of 27.5% suggests that surgical excision should be performed in those cases presenting with imaging-histological discordance after US-guided core biopsy. Careful correlation of clinical, radiological, and histological results as well as appropriate follow-up are essential.