All of the following are true about accelerated partial breast irradiation (APBI) EXCEPT:
A. APBI is delivered in an abbreviated fashion and a lower total dose than standard course of whole breast radiationAccelerated partial breast irradiation (APBI) is delivered in an abbreviated fashion (twice daily for 5 days) and at a lower total dose compared with the standard course of 5 to 6 weeks of radiation (50 Gray with or without a boost) in the case of whole breast irradiation. The ASTRO guidelines describe patients "suitable" for APBI to include women older than 60 years with a unifocal, Tl, ER-positive tumor with no lymphovascular invasion, and margins of at least 2 mm. Finally, a group felt to be "unsuitable" for APBI includes those with T3 or T4 disease, ER-negative disease, multifocality, multicentricity, extensive lymphovascular invasion (LVI), or positive margins.