2292: Factors affecting the efficacy of mammotome excision for removal of benign breast lesions

Abstract

Objectives: To assess the performance of Mammotome excision in the percutaneous removal of benign breast masses, and evaluate the factors influencing the rate of residual lesion and complications including hematoma. Methods: We reviewed 263 cases of percutaneous removal of breast mass using large core Mammotome (Ethicon Endo-surgery, Cincinnati, USA). All lesions were US BIRADS 3 category or benign lesion confirmed by previous biopsy. Indications to remove the mass were patient’s anxiety, fear for malignancy, difficulty for following up and so on. We retrospectively analyzed the characteristics of masses removed, presence of any complication, success of complete removal. Results: Pathologic results were mostly benign (98%) but four lesions were malignant or borderline. No clinically significant complication occurred. Imaginary complete removal rate was 95% immediately after procedure and 92% in 6 months follow up sonography. The cases with residual lesions showed larger size, shorter distance from the nipple and larger number of removed mass. Hematomas were more frequently observed in lesions close to the nipple. Conclusions: US-guided percutaneous removal using mammotome was useful method for the treatment of benign breast masses, but we should pay attention to the lesions close to the nipple to prevent hematoma and residual lesions.