45. Pernas S, Gil M, Benítez A, et al. Avoiding axillary treatment in sentinel lymph node micrometastases of breast cancer: a prospective analysis of axillary or distant recurrence. Ann Surg Oncol. 2010;17(3):772-777. 46. Lucci A, McCall LM, Beitsch PD, et al; American College of Surgeons Oncology Group. Surgical complications associated with sentinel lymph node dissection (SLND) plus axillary lymph node dissection compared with SLND alone in the American College of Surgeons Oncology Group Trial Z0011. J Clin Oncol. 2007;25(24):3657-3663. 47. Fleissig A, Fallowfield LJ, Langridge CI, et al. Post-operative arm morbidity and quality of life. Results of the ALMANAC randomised trial comparing sentinel node biopsy with standard axillary treatment in the management of patients with early breast cancer. Breast Cancer Res Treat. 2006;95(3):279-293. 48. Veronesi U, Paganelli G, Viale G, et al. A randomized comparison of sentinel-node biopsy with routine axillary dissection in breast cancer. N Engl J Med. 2003;349(6):546-553. 49. McMasters KM, Chao C, Wong SL, Martin RC III, Edwards MJ. Sentinel lymph node biopsy in patients with ductal carcinoma in situ: a proposal. Cancer. 2002;95(1):15-20. 50. Miller CL, Specht MC, Skolny MN, et al. Sentinel lymph node biopsy at the time of mastectomy does not increase the risk of lymphedema: implications for prophylactic surgery. Breast Cancer Res Treat. 2012;135(3):781-789. 51. Osako T, Iwase T, Ushijima M, et al. Incidence and prediction of invasive disease and nodal metastasis in preoperatively diagnosed ductal carcinoma in situ. Cancer Sci. 2014;105(5):576-582. 52. Khuri SF, Daley J, Henderson W, et al. Relation of surgical volume to outcome in eight common operations: results from the VA National Surgical Quality Improvement Program. Ann Surg. 1999;230 (3):414-429. 53. Hershman DL, Richards CA, Kalinsky K, et al. Influence of health insurance, hospital factors and physician volume on receipt of immediate post-mastectomy reconstruction in women with invasive and noninvasive breast cancer. Breast Cancer Res Treat. 2012;136(2):535-545.Owing to the widespread adoption of screening for breast cancer and improvements in the sensitivity of mammography, the diagnosis of ductal carcinoma in situ (DCIS) has increased dramatically over the past few decades. Historically, DCIS accounted for only 1% to 2% of all breast cancer diagnoses, but now it accounts for over 20%.Until the early 1990s, mastectomy was the standard surgical treatment for DCIS, and axillary lymph node dissection (ALND) was routine. Simultaneously with the rapid increase in diagnosis of DCIS in the 1980s and early 1990s, the use of breast-conserving surgery (BCS) for DCIS became more widely used. The use of axillary staging decreased as DCIS became more frequently diagnosed and more commonly treated with BCS.Sentinel lymph node biopsy (SLNB) for invasive breast cancer was first reported in 1993 by Krag et al, 1 and was validated in dozens of institutions in the late 1990s. Because validation studies demonstrated low false-ne...