Annelotte van Bommel

25 The NABON Breast Cancer Audit Table 1. Patient, tumor and treatment characteristics of patients included in the NABON Breast Cancer Audit (NBCA) stratified by invasive breast cancer and ductal carcinoma in situ (DCIS) (2011–2014). (continued) DCIS Invasive breast cancer (n=7,649) % a (n=49,073) % a Treatment Neo-adjuvant therapy Yes n.a. n.a. 6,262 13% Type of first surgery Breast conserving surgery 5,210 68% 29,070 59% Ablative surgery 2,381 31% 19,506 40% Immediate reconstruction b Yes 1,012 43% 3,364 17% Sentinel node procedure Yes 4,844 64% 39,839 82% Axillary lymph node dissection Yes 86 1% 12,388 25% Postoperative chemotherapy c Yes n.a. n.a. 12,423 40% Postoperative radiotherapy c Yes 3,169 52% 24,454 63% BI-RADS, Breast Imaging-Reporting and Data System; n.a., not applicable. a Percentages are rounded off, which in some cases leads to a total of above 100; b in case of ablative surgery; c calculated for 2011, 2012 and 2013 only. 2