Has breast cancer in the elderly remained the same over recent decades? A comparison of two groups of patients 70years or older treated for breast cancer twenty years apart

OBJECTIVES: Breast cancer (BC) in the elderly population is by far the most frequent malignancy in Western countries; however, little evidence is available regarding the specific management of this group. The purpose of this study was to identify how the biological and clinical characteristics of cancer have changed over the past 20years by comparing two groups of elderly patients with breast cancer operated on 20years apart. The secondary endpoint was to underline potential changes in surgical strategy over the past 20years. MATERIALS AND METHODS: One group of consecutive elderly patients undergoing surgery for BC between January 1990 and December 1993 (Group A), and one group undergoing surgery between January 2008 and December 2011 (Group B) were identified and analyzed. Data regarding surgical treatment, stage, tumor grading, hormonal and HER2/neu receptors, and Ki-67 were collected and compared. RESULTS: A total of 422 elderly patients underwent surgical treatment, 142 in Group A and 280 in Group B. An earlier stage at presentation was detected in Group B, T1 (57.5% B vs. 31.6% A) and N0 (64.6% B vs. 54.2% A). Surgical treatment in the first group was more extensive while conservative procedures were more frequently performed in the second group. Despite the earlier presentation, tumor grade was higher in Group B (G3 10.6% A vs. 32.1% B, p<0.05). Overexpression of Ki-67 was again more frequent in Group B (56.2% B vs. 32.5% A, p