Phase IV Trial to Evaluate Breast Brachytherapy Using the Mammosite-Ml®

Not Applicable

Completed

Brief Summary: This study will evaluate the local control rate, cosmetic results, and complication rates of breast brachytherapy delivered using the MammoSite-ML® when used as the sole method of radiation therapy or as a boost technique for patients with stage I-II carcinoma of the breast (\< 3 cm), (non-lobular histology) treated with lumpectomy with histologically negative surgical margins by at least 2 mm, negative axillary lymph nodes, and DCIS.

Hypotheses:

* For selected patients with stage I breast carcinoma and Ductal Carcinoma In Situ (DCIS), radiation therapy delivered with brachytherapy alone using the MammoSite-ML® is technically feasible and reproducible with acceptable complication rates.

* Cosmetic results after brachytherapy will be similar to that obtained after traditional whole breast external beam radiation therapy.

* Local tumor control rate in the breast after brachytherapy will be similar to that of conventional external beam radiation therapy, with less inconvenience and potentially less cost to the patient, given the selection criteria which minimize the risk of clinically significant multicentric or extensive residual carcinoma following lumpectomy.

Recruitment & Eligibility

Inclusion Criteria

Women,age of at least 45 years
Zubrod performance status of 0-2
AJCC Stage I-II (T1-T2, N0 M0) breast cancer
Maximum tumor dimension < 3 cm
Invasive ductal, medullary, papillary, tubular, colloid (mucinous) histologies
Unifocal breast cancer
Unilateral breast cancer (no synchronous or previous contralateral breast cancer)
Lumpectomy with negative surgical margins by at least 2 mm or re-excision specimen with negative surgical margins by at least 2 mm
Ductal Carcinoma In-Situ
Negative axillary lymph nodes for invasive breast cancer (sentinel node biopsy or standard level I-II dissection with > 6 nodes removed)
Time interval from final breast surgery to brachytherapy loading less than 8 weeks
At least 2 mm of breast tissue between the skin and the MammoSite® balloon surface(prefer > 5 mm)
If chemotherapy is planned, it must begin no earlier that 2 weeks following completion of radiation therapy. If chemotherapy is first, a minimum of 2 weeks from the last cycle must elapse prior to the start of radiation therapy.
Signed study-specific consent form

Exclusion Criteria

Invasive lobular histology
Non-epithelial breast malignancies such as sarcoma or lymphoma
Multifocal or multicentric invasive carcinoma
Extensive intraductal component (EIC)
Paget's disease of the nipple
Skin involvement by tumor, regardless of tumor size
Positive axillary lymph nodes
Distant metastases
Collagen vascular disease (scleroderma)
Pregnant or lactating women, due to potential exposure of the fetus to RT and unknown effects of RT on lactating females (negative pregnancy test for women of child-bearing age)
Any previously treated or synchronous contralateral breast carcinoma
Patients with psychiatric or addictive disorder that would preclude obtaining informed Consent
Men

Arm && Interventions

Group	Intervention	Description
Boost	Mammosite ML	patients will be treated with HDR brachytherapy using Mammosite ML as a boost technique prior to standard external beam radiation after lumpectomy for breast cancer or DCIS
Sole method	Mammosite ML	patients will be treated with HDR brachytherapy using Mammosite ML as the sole method for radiation delivery after lumpectomy for breast cancer or DCIS

Primary Outcome Measures

Name	Time	Method
Ipsilateral Recurrence Rate	5 years	* Local recurrence is defined as either invasive or non-invasive breast cancer recurrence within the target volume. * Elsewhere recurrence is defined as either invasive or non-invasive breast cancer recurrence outside of the target volume. * Local control rate will be evaluated by imaging techniques, physical exam and biopsy, if applicable. Measured as a count of participants experiencing recurrence, i.e. each subject experiencing ipsilateral tumor recurrence within 5 years = 1, and each subject with no ipsilateral tumor recurrence within 5 years = 0

Secondary Outcome Measures

Name	Time	Method
Cosmetic Results	6 months after treatment, then annually for 5 years	Evaluation of cosmetic results as judged by the patient, surgeon, and radiation oncologist at stated follow up intervals. Serial photographs will be obtained. The cosmetic results will be assessed using the four category Harvard Scale definitions: Excellent - The treated breast looks essentially the same as the opposite breast Good - Minimal but identifiable effects of radiation on the treated breast Fair - Significant effects of radiation on the treated breast Poor - Severe normal tissue sequelae secondary to irradiation
Toxicity Measured Through Adverse Event Incidence	during therapy, 6 weeks after completion of therapy, and additionally as needed	The incidence of serious adverse events will be calculated. Adverse events reviewed for device harm/toxicity include skin redness, breast pain, infections, breast swelling, and rib fractures.

Locations (2): Mercy Hospital St. Louis
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Saint Louis, Missouri, United States
Mercy Clinic St. Louis Cancer and Breast Institute
🇺🇸
Saint Louis, Missouri, United States