Intraoperative Radiation Therapy (IORT) in DCIS

Inclusion Criteria:

Pathologically confirmed DCIS of the breast
Clinical ≤ 3.0 cm unifocal lesion
No clinical or pathological evidence of nodal involvement
Operable DCIS, suitable for breast conserving surgery
Plans to administer irradiation to the breast only
Eastern Cooperative Oncology Group (ECOG) performance status of 0-3, however grade 4 patients may be enrolled at the discretion of the treating radiation oncologist
Must have had a diagnostic mammogram or MRI performed within last 6 months
Women of child-bearing potential must have a negative pregnancy test in accordance to institutional guidelines
Women of child-bearing potential must agree to use adequate contraceptive precautions (defined as oral contraceptives, intrauterine devices, surgical contraceptives, or combination of condom and spermicide) from the time of negative pregnancy test through the radiation treatment period.
English or Spanish speaking
Able to sign informed consent
Amenable to regular follow-up (according to research policies) for at least 5 years.

Exclusion Criteria:

Histologic or clinical evidence of invasive breast cancer
Multicentric cancer in the ipsilateral breast as diagnosed by clinical examination, imaging, or pathologic assessment, not amenable to excision with negative margins with a single lumpectomy
Synchronous bilateral breast cancer at the time of diagnosis
Pathologic or imaging evidence of lymph node involvement
Any severe concomitant disease that may limit their life expectancy to less than 5 years.
Prior history of breast cancer or in-field radiation in the ipsilateral breast.
Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements.
Pregnant or breast feeding women