Excision margins in breast conserving surgery

Abstract

The ideal excision margin in breast conserving surgery is still a matter of debate. The aim is to see if there is any correlation between increasing excision margin distance and local recurrence rate. Patients who had breast conserving surgery at Mater Dei Hospital in 2009 had their notes reviewed retrospectively. Patient demograpichs, including the excision margins were recorded. Local recurrences within a 3 year follow up period were noted. Chi square was used to compare categorical data and a p value of less than 0.05 was considered statistically significant. 91 patients were recruited into the study. 74 patients (81.5%) had negative margins (>1mm), 10 patients (11%) had close margins (<1mm) while 7 patients (7.5%) had positive margins. 5 patients (5.5%) had local recurrence. The highest recurrence rate (14%) was in patients with positive margins, and no statistical signficant difference in recurrence rates was noted with wider excision margins. As long as the margins are negative, increasing excision margins will not result in a better local recurrence rate.