Single Fraction High-Gradient Partial Breast Irradiation in Treating Patients With Low-Risk Stage 0-I Breast Cancer
Single Fraction High-Gradient Partial Breast Irradiation in Treating Patients With Low-Risk Stage 0-I Breast Cancer
This phase I/II clinical trial studies the side effects of delivering radiation therapy in a
 single session instead of multiple treatments over several weeks and to see how well it works
 in treating patients with low-risk stage 0-I breast cancer. Partial-breast irradiation, a
 type of radiation therapy focused only to the part of the breast that has cancer in it, given
 at a lower dose than standard whole-breast radiation therapy. Single fraction high-gradient
 partial-breast irradiation may cause fewer side effects, help prevent breast cancer from
 coming back, and improve the appearance of the breast and quality of life of patients with
 breast cancer.
This is a phase I/II study which will evaluate the complication rates, local control,
 cosmetic results, and quality of life of single fraction high gradient partial breast
 irradiation (HG-PBI) when used as the sole method of radiation therapy for patients with
 pathologic stage 0 (=< 2 cm) or I carcinoma of the breast treated with partial mastectomy
 with histologically assessed negative surgical margins.
Inclusion Criteria:

 -  AJCC 7th Edition stage 0 or I (TisN0 ≤ 2 cm or T1N0) histologically confirmed
 carcinoma of the breast, treated with partial mastectomy. Axillary sampling is
 required only for cases of invasive cancers. Tumor size is determined by the
 pathologist. Clinical size may be used if the pathologic size is indeterminate.
 Patients with invasive cancer must have no positive axillary lymph nodes with at least
 6 axillary lymph nodes sampled or a negative sentinel node.

 -  Negative histologic margins of partial mastectomy or re-excision specimen. Margins
 generally are positive if there is invasive or noninvasive tumor at the inked
 resection margin, close but negative if the tumor is within 2 mm of the inked margin
 and negative if the tumor is at least 2 mm away from the inked edge.

 -  Invasive ductal, lobular, medullary, papillary, colloid (mucinous), tubular
 histologies, or mixed histologies (lesions ≤ 2 cm) that are estrogen or progesterone
 receptor positive and do not exhibit HER2/neu gene amplification OR ductal carcinoma
 in situ (lesions ≤ 2 cm).

 -  Systemic therapy, if planned, must be adjuvant in nature and not be scheduled to begin
 for at least 4 weeks after completion of HG-PBI.

 -  Good candidate for treatment per protocol in the judgment of the PI and/or treating
 physician following simulation.

 -  Postmenopausal status.

 -  Age ≥ 50 years at diagnosis.

 -  Able to understand and willing to sign IRB-approved written informed consent document.

 -  English speaker.

 Exclusion Criteria:

 -  Presence of distant metastases.

 -  In situ lobular carcinoma or nonepithelial breast malignancies such as sarcoma or
 lymphoma.

 -  Proven multicentric carcinoma (tumors in different quadrants of the breast, or tumors
 separated by at least 4 cm) with other clinically or radiographically suspicious areas
 in the ipsilateral breast unless confirmed to be negative for malignancy by biopsy.

 -  Premenopausal status.

 -  Histologically confirmed positive axillary nodes in the ipsilateral axilla. Palpable
 or radiographically suspicious contralateral axillary, supraclavicular,
 infraclavicular, or internal mammary nodes, unless there is histologic confirmation
 that these nodes are negative for tumor.

 -  Prior non-hormonal therapy for the present breast cancer, including radiation therapy
 or chemotherapy.

 -  Diagnosis of systemic lupus erythematosis, scleroderma, or dermatomyositis.

 -  Diagnosis of a coexisting medical condition which limits life expectancy to < 2 years.

 -  Diagnosis of psychiatric or addictive disorders that would preclude obtaining informed
 consent.

 -  History of other malignancy ≤ 5 years previous with the exception of basal cell or
 squamous cell carcinoma of the skin which were treated with local resection only or
 carcinoma in situ of the cervix.

 -  Paget's disease of the nipple.

 -  Skin involvement, regardless of tumor size.

 -  Unsatisfactory breast for HG-PBI as determined by the treating physician. For example,
 if there is little breast tissue remaining between the skin and pectoralis muscle
 after surgery, treatment with HG-PBI is technically problematic.

 -  Partial mastectomy so extensive that the cosmetic result is fair or poor prior to
 HG-PBI as determined by the treating physician.

 -  Surgical margins which cannot be microscopically assessed or are positive at
 pathological evaluation.

 -  Time between final definitive breast procedure to HG-PBI simulation is greater than 8
 weeks.

 Inclusion of Women and Minorities

 -Women and members of all races and ethnic groups are eligible for this trial. Because
 breast cancer occurs rarely in men, men will not be recruited for participation.