“…However, the necessity of giving WBI to all patients after BCS has been questioned, and several centers have evaluated the feasibility and efficacy of partial-breast irradiation (PBI) [1,2,4,5,7,[9][10][11]14]. Parallel with the growing evidence obtained from phase I-II studies supporting the use of PBI for selected early stage breast cancer patients, three early phase III trials comparing different techniques of PBI to conventional WBI have been conducted in the early 1980s and 1990s [3,6,8,12]. During the 2009 ASCO (American Society of Clinical Oncology) Meeting, Valachis et al [15] presented a meta analysis of these randomized controlled PBI trials.…”