Short course hypofractionated whole breast irradiation after conservative surgery: a single institution phase II study

To assess the oncologic outcomes of hypofractionated whole breast irradiation (Hypo-WBI).Eligible patients had undergone breast conservative surgery for early breast cancer (pTis-2) and none/limited nodal involvement. Hypo-WBI consisted of 34 Gy in 10 daily fractions over 2 weeks to the whole breast three-dimensional conformal radiotherapy (3DCRT), followed by a single fraction of 8 Gy to the tumor bed after 1 week (electrons). Primary endpoint...