Evaluation of Two Boost Radiation Schedules in Post Lumpectomy Early Stage Carcinoma Breast

Plain-language summary

In a general radiation oncology practice, breast cancer typically comprises approximately 25% of the total patient caseload.1 Surgery is the primary modality of treatment. Radical mastectomy remained the mainstay of surgical therapy into the 1970s. Breast-conserving surgery followed by radiation therapy to the intact breast is an established standard of care for the majority of women with early stage invasive breast cancer. Recommended techniques for breast-conservation treatment are local excision of the primary tumor, preferably with clear margins, axillary lymph node dissection, and breast irradiation (45 to 50 Gy), usually with a boost (10 to 20 Gy, depending on tumor size and status of the surgical margins). The aim of this study is to compare the two boost regimen 10Gy/5#/1 week with 16Gy/8#/1.5 weeks in post lumpectomy patients of early stage breast cancer, following whole breast irradiation (WBI). The study will include 50 patients, (25 in each arm) of early stage post lumpectomy breast cancer patients. Each patient will be treated by WBI followed by tumor bed boost with either electron beam therapy or 3D CRT. The primary end point of the study will be assessment of acute and late radiation toxicities, cosmetic score analysis and local control between two schedules. Secondary end points will be recurrence-free survival.

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