Breast Cancer Biology for the Radiation Oncologist


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As clinical, histological, and computer-based tools are not sufficient to predict local relapse, prognostic and predictive biological factors are needed. A tissue-micro-array has been built, based on an "intrinsic gene signature" showing that Her2 overexpression and basal-like breast cancer subtypes were prognostic factors for local relapse [ 34 ]. Other genomic classifications could be used to determine the risk of local relapse after breast conserving surgery, such as "wound signature" [ 35 ]. Breast cancer cell lines that overexpressed Her2 oncoprotein are known to be resistant to IR. When trastuzumab was combined with IR, an enhancement of in vitro and in vivo tumor radiosensitization was observed, through DNA repair inhibition and through an increased tumor cell death [ 41 , 42 ].

Recently, the addition of trastuzumab to radiotherapy has been shown to be an effective radiosensitizer in patients with Her2 overexpression, with chemotherapy-refractory disease, locally-advanced or recurrent breast cancer in a phase II trial. Different parameters could be involved in the development of late radiation-induced toxicity, such as genetic factors DNA repair deficiency or epigenetic factors obesity, vascular, or collagen diseases Other issues could also be involved in radiation-induced toxicities such as radiotherapy parameters total dose, dose per fraction, irradiated target and normal tissue volumes , history of surgery within irradiated fields, and the combination of either chemotherapy or endocrine therapy with radiation therapy.

Recently, a nomogram was built to predict the risk of fibrosis after breast-conserving therapy [ 44 ]. The main limitation for daily use of this nomogram is that this computer-based tool cannot identify a population at high risk of severe late radiation-induced toxicities. Indeed, when usual radiotherapy parameters were considered, i. This over-risk is larger than observed fibrosis after breast conserving therapy.

Biological predictive factors are warranted to identify the individual risk of development of severe late toxicity. A lymphocyte apoptosis assay has been developed as a rapid tool for characterization of normal tissue radiosensitivity, particularly due to the ease of blood collection in a standardized, patient-friendly manner [ 45 - 47 ]. Biological tools can play a part in each step of the management of early breast cancer from diagnosis to treatment; i.

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Radiation therapy for breast cancer - Mayo Clinic

Currently used biological tools for prognostic classification or for predicting systemic treatment efficacy, could be applied for locoregional treatments to predict antitumor efficacy. In addition, radiation oncologists have developed new tools focusing on normal tissue radiosensitivity that may be adapted to systemic therapies in the near future. Dedicated prospective studies are urgently warranted in this setting. All the listed authors have been involved in drafting or in revising the manuscript. All authors read and approved the final manuscript. National Center for Biotechnology Information , U.

Journal List Radiat Oncol v. Radiat Oncol. Published online Jan Author information Article notes Copyright and License information Disclaimer. Corresponding author.

Real Questions - Breast Radiation Therapy

Received Nov 9; Accepted Jan This article has been cited by other articles in PMC. Abstract Early breast cancer treatment is based on a multimodality approach with the application of clinical and histological prognostic factors to determine locoregional and systemic treatments. Introduction Breast cancer is the most common female cancer in France with increasing incidence over the last two decades and with decreasing mortality [ 1 ].

Biological tools The advent of biological tumor analysis has generated information to classify prognostic features of breast cancer, and to assess treatment efficacy. The contribution of biology and endocrine therapies Patients with hormonal receptor-positive breast cancers receive endocrine therapy given over five consecutive years, with either tamoxifen TAM in premenopausal women, or aromatase inhibitors AI or sequential endocrine therapy in postmenopausal women [ 17 ]. Contribution of biology in adjuvant radiotherapy of early breast cancer Biological technologies have been largely developed for classifying breast cancers after systemic therapies, and for predicting the efficacy of systemic therapies, whereas biological contribution in the field of locoregional treatment is less developed.

Biological tools: To determine breast cancer patients at high risk of local relapse The current locoregional management of early breast cancer consists of breast conserving surgery i. Biological tools: a need for combined therapies Breast cancer cell lines that overexpressed Her2 oncoprotein are known to be resistant to IR.

Biological tools: To a personalized radiosensitivity of normal tissues Different parameters could be involved in the development of late radiation-induced toxicity, such as genetic factors DNA repair deficiency or epigenetic factors obesity, vascular, or collagen diseases Conclusion Biological tools can play a part in each step of the management of early breast cancer from diagnosis to treatment; i. Conflict of interests The authors declare that they have no competing interests.

Cancer incidence and mortality in France over the period Rev Epidemiol Sante Publique. Molecular portraits of human breast tumours. Gene expression patterns of breast carcinomas distinguish tumor subclasses with clinical implications. Gene expression profiling predicts clinical outcome of breast cancer.

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A multigene assay to predict recurrence of tamoxifen-treated, node-negative breast cancer. N Engl J Med. Gene-expression profiles to predict distant metastasis of lymph-node-negative primary breast cancer. Robustness, scalability, and integration of a wound-response gene expression signature in predicting breast cancer survival. The prognostic role of a gene signature from tumorigenic breast-cancer cells.

Array-CGH and breast cancer. Breast Cancer Res. Exonic expression profiling of breast cancer and benign lesions: a retrospective analysis. Lancet Oncol. Use of gene signature to predict prognosis of patients with node-negative breast cancer: a prospective community-based feasibility study RASTER Lancet Oncol.


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Medico-economic evaluation of the rapid diagnosis of breast lesions using fine-needle aspiration in a one stop breast clinic Abstr. Total RNA yield and microarray gene expression profiles from fine-needle aspiration biopsy and core-needle biopsy samples of breast carcinoma.

Highlights of UNC breast clinical trials:

Fine-needle aspiration for nucleic acid-ased molecular analyses in breast cancer. Cancer Cytopathol. Fine needle aspiration cytology versus percutaneous biopsy of nonpalpable breast lesions. Eur J Radiol. Recent advances in systemic therapy: new diagnostics and biological predictors of outcome in early breast cancer.

Progress and promise: highlights of the international expert consensus on the primary therapy of early breast cancer Ann Oncol. Prognostic and predictive value of centrally reviewed Ki labeling index in postmenopausal women with endocrine-responsive breast cancer: results from Breast International Group Trial comparing adjuvant tamoxifen with letrozole. J Clin Oncol. Effects of radiotherapy and of differences in the extent of surgery for early breast cancer on local recurrence and year survival: an overview of the randomised trials.

Recurrence rates after treatment of breast cancer with standard radiotherapy with or without additional radiation. In addition, all research work is performed internationally, which promotes a rapid spread of clinical trial results. A preliminary screening of applications will be done to verify their completeness and conformity with the above mentioned eligibility criteria.

Eligible applications will then be forwarded to the relevant Head s of Department s for assessment. The applicants will be contacted to arrange a telephone interview. For more information about the Fellowship Programme, contact us.


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Both degrees obtained at the Free University of Brussels, Belgium. She worked as an intern in the National Bank of Belgium at the international statistics department. This fellowship is focused on reviewing the governance structure of the EORTC as a non-profit organization. She has a keen interest in improving patient outcomes through quality improvement in radiotherapy. During her studies, she worked on the comparison between Generalized Pairwise Comparisons and weighted log-rank test when hazards are not proportional and treatment effect is delayed.

She became a board certified general surgeon, breast oncologist and also medical oncologist after finishing all of those fellowships at St. She also focused on translational research of gene expression profiling analysis in breast cancer as her PhD research project.

External Beam Breast Cancer Radiation

In medical school she always had a special interest in surgery, and breast cancer surgery in particular. To learn more about the different aspects of treatment in breast cancer and the collaboration between different specialties, she organised clinical internships at the Radiotherapy department and the Plastics and Reconstructive Surgery department.

During her last year of medical school she has performed a retrospective study to determine the additional value of removing more than on sentinel node in breast cancer, at the OLVG hospital in Amsterdam. Emiel Rutgers, dr.

Breast Cancer Biology for the Radiation Oncologist Breast Cancer Biology for the Radiation Oncologist
Breast Cancer Biology for the Radiation Oncologist Breast Cancer Biology for the Radiation Oncologist
Breast Cancer Biology for the Radiation Oncologist Breast Cancer Biology for the Radiation Oncologist
Breast Cancer Biology for the Radiation Oncologist Breast Cancer Biology for the Radiation Oncologist
Breast Cancer Biology for the Radiation Oncologist Breast Cancer Biology for the Radiation Oncologist

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