Inclusion Criteria:

          -  Pathologically proven diagnosis of breast cancer

          -  Clinical node negative stage I (T1N0) or stage II (T2N0) breast cancer

               -  Preoperative ultrasound of the axilla with biopsy of suspicious nodes is
                  recommended as clinically indicated per the discretion of the treating physician

          -  Appropriate stage for protocol entry including no clinical evidence for distant
             metastases based upon the following minimum diagnostic workup

          -  History/physical examination, documentation of weight and Zubrod performance status
             0-2 within 28 days prior to study entry

          -  Right and left mammography within 90 days of diagnostic biopsy establishing diagnosis

          -  Absolute neutrophil count > 1800 cells/cubic mm

          -  Platelets >= 75,000 cells/cubic mm

          -  Hemoglobin >= 8 g/dL

          -  Women of childbearing potential must have a negative urine or serum pregnancy test
             within 14 days of study entry

          -  Women of childbearing potential must be non-pregnant and non-lactating and willing to
             use medically acceptable form of contraception during radiation therapy

          -  Patients must provide study specific informed consent prior to study entry

        Exclusion Criteria:

          -  Clinical T4, N2 or N3, M1 pathologic stages III or IV breast cancer

          -  Prior invasive non-breast malignancy (except non-melanoma skin cancer, carcinoma in
             situ of the cervix) unless disease free for a minimum of 3 yrs prior to study entry

          -  Prior invasive or in-situ carcinoma of the breast (prior lobular breast carcinoma in
             situ [LCIS] is eligible)

          -  Two or more cancers not resectable through a single lumpectomy incision

          -  Bilateral breast cancer

          -  Ductal breast carcinoma in situ (DCIS) only

          -  Non-epithelial breast malignancies such as sarcoma/lymphoma

          -  Male breast cancer

          -  Paget's disease of the nipple

          -  Prior radiotherapy to the breast or prior radiation to the region of the ipsilateral
             breast that would result in overlap of radiation fields

          -  Pregnancy or women of childbearing potential who are sexually active and not
             willing/able to use medically acceptable forms of contraception

          -  Active systemic lupus, erythematosus, or any history of scleroderma, dermatomyositis
             with active rash

          -  Medical, psychiatric or other condition that would prevent the patient from receiving
             the protocol therapy or providing informed consent