Must have pathologically confirmed invasive adenocarcinoma or ductal carcinoma in situ of the breast. 
Patients must have undergone segmental mastectomy (i.e., lumpectomy). 
Patients must not have received prior radiation therapy to the breast. 
Patients must not have active local-regional disease prior to registration. 
Patients must not be pregnant because of the potential for fetal harm as a result of radiation treatment. Women of child-bearing age will be given a serum pregnancy test prior to study entry to ensure they are not pregnant. They will also be counseled on the importance of avoiding pregnancy and hormonal contraception while undergoing radiation therapy. 
Patients must not have a serious medical or psychiatric illness which prevents informed consent or compliance with treatment. 
All patients must be informed of the investigational nature of this study and give written informed consent in accordance with institutional and federal guidelines. 

NCT00894712_inc_T2
Procedure
pathologically
NCT00894712_inc_T3
Value
confirmed
NCT00894712_inc_T4
Condition
invasive adenocarcinoma
NCT00894712_inc_T5
Condition
ductal carcinoma in situ
NCT00894712_inc_T1
Procedure
segmental mastectomy
NCT00894712_inc_T6
Procedure
lumpectomy
NCT00894712_inc_T7
Procedure
radiation therapy
NCT00894712_inc_T8
Negation
not
NCT00894712_inc_T9
Qualifier
of the breast
NCT00894712_inc_T10
Condition
local-regional disease
NCT00894712_inc_T12
Temporal
active
NCT00894712_inc_T13
Negation
not