Several studies showed that breast conserving therapy (BCT) yields similar survival rates as mastectomy. BCT consists of lumpectomy followed by whole breast radiotherapy (WBRT). Three studies showed that an additional dose to the tumor bed, after 50 Gy WBRT, reduces the local recurrence rate (LRR). The largest of these 3 studies was a recent EORTC trial, which also showed that young age was an independent risk factor for LR after BCT.