One operation after percutaneous diagnosis of nonpalpable breast cancer: Frequency and associated factors

OBJECTIVE. The purpose of this study was to determine the frequency of and factors associated with performing one therapeutic operation after percutaneous diagnosis of nonpalpable breast cancer. MATERIALS AND METHODS. Retrospective review was performed of records of 350 consecutive women who had therapeutic surgery after percutaneous imaging-guided core biopsy diagnosis of nonpalpable breast cancer. Records were reviewed to determine the frequency of performing one operation and associated factors. Statistical analysis was performed. RESULTS. One operation was performed in 283 (80.9%) of 350 women, including (95.5%) of 111 women who had mastectomy and 177 (74.1%) of 239 women who had breast conserving surgery. At bivariate analysis, one operation was significantly more likely in women who had no underestimation (p < 0.001), mastectomy rather than breast conservation (p < 0.001), axillary dissection during the first operation (p < 0.001). percutaneous diagnosis of infiltrating carcinoma (p = 0.001), or mammographic mass (p = 0.006). At multivariate analysis, one operation was significantly more likely if underestimation was absent (odds ratio [OR] = 10.1, 95% confidence interval [CI] = 4.2-24.7) or if mastectomy was performed (OR = 8.7, 95% CI = 3.2-23.5); for women who had breast-conserving surgery, one operation was significantly more likely if underestimation was absent (OR = 11.4, 95% CI = 3.9-33.2) or if a mammographic mass was present (OR = 2.4, 95% CI = 1.3-4.6). CONCLUSION. One operation was performed in 80.9% of women with percutaneously proven nonpalpable breast cancer, including 74.1% of women who had breast-conserving surgery and 95.5% of women who had mastectomy. Among women who had breast conversation, one operation was significantly more likely if histologic underestimation was absent or if a mammographic mass was present.