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Piroth MD, Strnad V, Krug D, Fastner G, Baumann R, Combs SE, Duma MN, Dunst J, Feyer P, Fietkau R, Haase W, Harms W, Hehr T, Sedlmayer F, Souchon R, Budach W. Long-Term Results of the TARGIT-A Trial: More Questions than Answers. Breast Care (Basel) 2022; 17:81-84. [PMID: 35355706 PMCID: PMC8914270 DOI: 10.1159/000515386] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 02/20/2021] [Indexed: 02/03/2023] Open
Abstract
Background During the last decade, partial breast irradiation (PBI) has gained traction as a relevant treatment option for patients with early-stage low-risk breast cancer after breast-conserving surgery. The TARGIT-A prospective randomized trial compared a "risk-adapted" intraoperative radiotherapy (IORT) approach with 50-kv X-rays (INTRABEAM®) as the PBI followed by optional whole-breast irradiation (WBI) and conventional adjuvant WBI in terms of observed 5-year in-breast recurrence rates. Recently, long-term data were published. Since the first publication of the TARGIT-A trial, a broad debate has been emerged regarding several uncertainties and limitations associated with data analysis and interpretation. Our main objective was to summarize the data, with an emphasis on the updated report and the resulting implications. Summary From our point of view, the previously unresolved questions still remain and more have been added, especially with regard to the study design, a change in the primary outcome measure, the significant number of patients lost to follow-up, and the lack of a subgroup analysis according to risk factors and treatment specifications. Key Message Taking into account the abovementioned limitations of the recently published long-term results of the TARGIT-A trial, the German Society of Radiation Oncology (DEGRO) Breast Cancer Expert Panel adheres to its recently published recommendations on PBI: "the 50-kV system (INTRABEAM) cannot be recommended for routine adjuvant PBI treatment after breast-conserving surgery."
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Affiliation(s)
- Marc D. Piroth
- Department of Radiation Oncology, Helios University Hospital Wuppertal, Witten/Herdecke University, Wuppertal, Germany
| | - Vratislav Strnad
- Department of Radiation Oncology, University Hospital, Erlangen, Germany
| | - David Krug
- Department of Radiation Oncology, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Gerd Fastner
- Department of Radiation Oncology, Paracelsus Medical University Hospital, Salzburg, Austria
| | - René Baumann
- Department of Radiation Oncology, St. Marien-Krankenhaus, Siegen, Germany
| | - Stephanie E. Combs
- Department of Radiation Oncology, Technical University of Munich (TUM), München, Germany
| | - Marciana Nona Duma
- Department of Radiation Oncology, Friedrich-Schiller-University Hospital, Jena, Germany
| | - Jürgen Dunst
- Department of Radiation Oncology, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Petra Feyer
- Department of Radiation Oncology, Vivantes Hospital Neukoelln, Berlin, Germany
| | - Rainer Fietkau
- Department of Radiation Oncology, University Hospital, Erlangen, Germany
| | - Wulf Haase
- Formerly St.-Vincentius-Hospital Karlsruhe, Karlsruhe, Germany
| | - Wolfgang Harms
- Department of Radiation Oncology, St. Claraspital, Basel, Switzerland
| | - Thomas Hehr
- Department of Radiation Oncology, Marienhospital, Stuttgart, Germany
| | - Felix Sedlmayer
- Department of Radiation Oncology, Paracelsus Medical University Hospital, Salzburg, Austria
| | | | - Wilfried Budach
- Department of Radiation Oncology, Heinrich-Heine-University Hospital, Düsseldorf, Germany
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In Reply to Vaidya et al. Int J Radiat Oncol Biol Phys 2021; 110:907-908. [PMID: 33640420 DOI: 10.1016/j.ijrobp.2021.02.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 02/11/2021] [Indexed: 11/23/2022]
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Dutta SW, Aliotta E, Alonso CE, Bliley RC, Romano KD, Libby B, Showalter TN, Showalter SL, Janowski EM. Normal tissue dose and risk estimates from whole and partial breast radiation techniques. Breast J 2019; 26:1308-1315. [PMID: 31876106 DOI: 10.1111/tbj.13735] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/03/2019] [Accepted: 12/05/2019] [Indexed: 11/29/2022]
Abstract
PURPOSE To compare radiation dose to organs at risk in patients with early-stage breast cancer treated with lumpectomy and intraoperative radiation therapy with CT-guided HDR brachytherapy (precision breast IORT; PB-IORT) and those treated with external beam whole breast irradiation (WB-DIBH) or partial breast irradiation (PB-DIBH) with deep inspiratory breath hold. METHODS We retrospectively identified 52 consecutive patients with left-sided breast cancers treated with either PB-IORT (n = 17, 76% outer breast) on a phase I clinical trial, adjuvant PB-DIBH (n = 18, 56% outer breast, 6% cavity boost), or WB-DIBH (n = 17, 76% outer breast, 53% with lumpectomy cavity boost). Conventional (2 Gy/fraction) or moderate hypofractionation (2.66 Gy/fraction) was prescribed for the external beam cohorts and 12.5 Gy in 1 fraction to 1 cm from the balloon surface was prescribed to the HDR brachytherapy cohort. CT-based planning was used for all patients. Organ at risk doses and excess risk ratios (ERR) for secondary lung cancers, contralateral breast cancers, and cardiac toxicity were compared between treatment techniques. RESULTS Compared to WB-DIBH and PB-DIBH, PB-IORT resulted in lower ipsilateral lung V5, V10, V20, mean, and max dose (P < .05). Mean ipsilateral lung BED3Gy was as follows: 1.32 Gy for PB-IORT, 4.33 Gy for WB-DIBH, 3.35 Gy for PB-DIBH. The ERR for lung cancer was lowest for PB-IORT (P < .001). There was significantly higher contralateral breast max dose but lower mean BED3Gy for WB-DIBH compared with PB-IORT (P = .012, P = .011, respectively). Mean contralateral breast BED3Gy was as follows: 0.10 Gy for PB-IORT, 0.06 Gy for WB-DIBH, and 0.08 Gy for PB-DIBH. The ERR for contralateral breast cancer was low for all breast techniques, but WB-DIBH showed lower ERR compared to PB-IORT (P = .019). Mean heart BED2Gy was higher with PB-IORT at 1.26 Gy compared to 0.48 Gy and 0.24 Gy for WB-DIBH and PB-DIBH, respectively (P < .001). CONCLUSIONS Patients with early-stage breast cancer treated with PB-IORT and with tissue-sparing external beam techniques all received low organ at risk doses, but PB-IORT resulted in far lower ipsilateral lung dose compared with external beam techniques. Our data indicate the lowest mean contralateral breast BED in the WB-DIBH group, likely due to the simplicity of the field design in low-risk patients using tangential whole breast radiation. External beam using DIBH results in lowest heart dose, but all techniques were well within recommended heart constraints.
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Affiliation(s)
- Sunil W Dutta
- Department of Radiation Oncology, University of Virginia, Charlottesville, VA, USA
| | - Eric Aliotta
- Department of Radiation Oncology, University of Virginia, Charlottesville, VA, USA
| | - Clayton E Alonso
- Department of Radiation Oncology, University of Virginia, Charlottesville, VA, USA
| | - Roy C Bliley
- Department of Radiation Oncology, University of Virginia, Charlottesville, VA, USA
| | - Kara D Romano
- Department of Radiation Oncology, University of Virginia, Charlottesville, VA, USA
| | - Bruce Libby
- Department of Radiation Oncology, University of Virginia, Charlottesville, VA, USA
| | - Timothy N Showalter
- Department of Radiation Oncology, University of Virginia, Charlottesville, VA, USA
| | | | - Einsley M Janowski
- Department of Radiation Oncology, University of Virginia, Charlottesville, VA, USA
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Kaiser J, Kronberger C, Moder A, Kopp P, Wallner M, Reitsamer R, Fischer T, Fussl C, Zehentmayr F, Sedlmayer F, Fastner G. Intraoperative Tumor Bed Boost With Electrons in Breast Cancer of Clinical Stages I Through III: Updated 10-Year Results. Int J Radiat Oncol Biol Phys 2018; 102:92-101. [DOI: 10.1016/j.ijrobp.2018.05.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 04/29/2018] [Accepted: 05/10/2018] [Indexed: 01/03/2023]
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Kirby AM. Updated ASTRO guidelines on accelerated partial breast irradiation (APBI): to whom can we offer APBI outside a clinical trial? Br J Radiol 2018; 91:20170565. [PMID: 29513031 PMCID: PMC6190767 DOI: 10.1259/bjr.20170565] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 11/29/2017] [Accepted: 03/02/2018] [Indexed: 11/05/2022] Open
Abstract
The American Society of Radiation Oncology has recently updated its guidelines on the role of accelerated partial breast irradiation in the management of breast cancer. This commentary discusses the new recommendations and how we might advise patients in the light of existing data.
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Affiliation(s)
- Anna M Kirby
- Department of Radiotherapy, Royal Marsden NHS Foundation Trust and Institute of Cancer Research, Sutton, UK
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Pilar A, Gupta M, Ghosh Laskar S, Laskar S. Intraoperative radiotherapy: review of techniques and results. Ecancermedicalscience 2017; 11:750. [PMID: 28717396 PMCID: PMC5493441 DOI: 10.3332/ecancer.2017.750] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Indexed: 12/14/2022] Open
Abstract
Intraoperative radiotherapy (IORT) is a technique that involves precise delivery of a large dose of ionising radiation to the tumour or tumour bed during surgery. Direct visualisation of the tumour bed and ability to space out the normal tissues from the tumour bed allows maximisation of the dose to the tumour while minimising the dose to normal tissues. This results in an improved therapeutic ratio with IORT. Although it was introduced in the 1960s, it has seen a resurgence of popularity with the introduction of self-shielding mobile linear accelerators and low-kV IORT devices, which by eliminating the logistical issues of transport of the patient during surgery for radiotherapy or building a shielded operating room, has enabled its wider use in the community. Electrons, low-kV X-rays and HDR brachytherapy are all different methods of IORT in current clinical use. Each method has its own unique set of advantages and disadvantages, its own set of indications where one may be better suited than the other, and each requires a specific kind of expertise. IORT has demonstrated its efficacy in a wide variety of intra-abdominal tumours, recurrent colorectal cancers, recurrent gynaecological cancers, and soft-tissue tumours. Recently, it has emerged as an attractive treatment option for selected, early-stage breast cancer, owing to the ability to complete the entire course of radiotherapy during surgery. IORT has been used in a multitude of roles across these sites, for dose escalation (retroperitoneal sarcoma), EBRT dose de-escalation (paediatric tumours), as sole radiation modality (early breast cancers) and as a re-irradiation modality (recurrent rectal and gynaecological cancers). This article aims to provide a review of the rationale, techniques, and outcomes for IORT across different sites relevant to current clinical practice.
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Affiliation(s)
- Avinash Pilar
- Department of Radiation Oncology, Tata Memorial Hospital, Dr Ernest Borges' Marg, Parel, Mumbai, MS, India 400012
| | - Meetakshi Gupta
- Department of Radiation Oncology, Tata Memorial Hospital, Dr Ernest Borges' Marg, Parel, Mumbai, MS, India 400012
| | - Sarbani Ghosh Laskar
- Department of Radiation Oncology, Tata Memorial Hospital, Dr Ernest Borges' Marg, Parel, Mumbai, MS, India 400012
| | - Siddhartha Laskar
- Department of Radiation Oncology, Tata Memorial Hospital, Dr Ernest Borges' Marg, Parel, Mumbai, MS, India 400012
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Dutta SW, Showalter SL, Showalter TN, Libby B, Trifiletti DM. Intraoperative radiation therapy for breast cancer patients: current perspectives. BREAST CANCER-TARGETS AND THERAPY 2017; 9:257-263. [PMID: 28458578 PMCID: PMC5402914 DOI: 10.2147/bctt.s112516] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Accelerated partial breast irradiation (APBI) provides an attractive alternative to whole breast irradiation (WBI) through normal tissue radiation exposure and reduced treatment duration. Intraoperative radiation therapy (IORT) is a form of APBI with the shortest time interval, as it delivers the entirety of a planned radiation course at the time of breast surgery. However, faster is not always better, and IORT has been met with healthy skepticism. Patients treated with IORT have an increased compliance and overall satisfaction when compared to patients treated with WBI. However, early randomized trial results demonstrated an increased rate of recurrence after IORT, slowing its widespread adoption. Despite these controversies, IORT utilization is increasing nationally and several novel developments are aimed at continuing to minimize the risk of recurrence and treatment-related toxicity while maximizing the patient experience.
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Affiliation(s)
| | - Shayna L Showalter
- Division of Surgical Oncology, Department of Surgery, University of Virginia School of Medicine, Charlottesville, VA, USA
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Yarnold J, Somaiah N, Bliss JM. Hypofractionated radiotherapy in early breast cancer: Clinical, dosimetric and radio-genomic issues. Breast 2015; 24 Suppl 2:S108-13. [PMID: 26249121 DOI: 10.1016/j.breast.2015.07.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Affiliation(s)
- John Yarnold
- Division of Radiotherapy and Imaging, The Institute of Cancer Research & Royal Marsden NHS Foundation Trust, London, UK.
| | - Navita Somaiah
- Division of Radiotherapy and Imaging, The Institute of Cancer Research & Royal Marsden NHS Foundation Trust, London, UK
| | - Judith M Bliss
- Clinical Trials and Statistic Unit (ICR-CTSU), Division of Clinical Studies, The Institute of Cancer Research & Royal Marsden NHS Foundation Trust, London, UK
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Kirby A, Hanna G, Wilcox M, MacKenzie M. In Regard to Vaidya et al. Int J Radiat Oncol Biol Phys 2015; 92:957-958. [PMID: 26194666 DOI: 10.1016/j.ijrobp.2015.05.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 05/15/2015] [Indexed: 11/18/2022]
Affiliation(s)
- Anna Kirby
- Royal Marsden & Institute of Cancer Research, London, UK
| | - Gerard Hanna
- Department of Clinical Oncology, Centre for Cancer Research and Cell Biology, Queen's University of Belfast, UK
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Guedea F, Eraso A, Azria D, Lara P, Izar F. In Regard to Hepel and Wazer. Int J Radiat Oncol Biol Phys 2015; 92:958. [DOI: 10.1016/j.ijrobp.2015.03.033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 03/30/2015] [Indexed: 12/01/2022]
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Eaton DJ. Electronic brachytherapy--current status and future directions. Br J Radiol 2015; 88:20150002. [PMID: 25748070 PMCID: PMC4628482 DOI: 10.1259/bjr.20150002] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Revised: 02/28/2015] [Accepted: 03/05/2015] [Indexed: 12/17/2022] Open
Abstract
In the past decade, electronic brachytherapy (EB) has emerged as an attractive modality for the treatment of skin lesions and intraoperative partial breast irradiation, as well as finding wider applications in intracavitary and interstitial sites. These miniature X-ray sources, which operate at low kilovoltage energies (<100 kV), have reduced shielding requirements and inherent portability, therefore can be used outside the traditional realms of the radiotherapy department. However, steep dose gradients and increased sensitivity to inhomogeneities challenge accurate dosimetry. Secondly, ease of use does not mitigate the need for close involvement by medical physics experts and consultant oncologists. Finally, further studies are needed to relate the more heterogeneous dose distributions to clinical outcomes. With these provisos, the practical convenience of EB strongly suggests that it will become an established option for selected patients, not only in radiotherapy departments but also in a range of operating theatres and clinics around the world.
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Affiliation(s)
- D J Eaton
- NCRI Radiotherapy Trials Quality Assurance Group, Mount Vernon Hospital, London, UK
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Esposito E, Anninga B, Harris S, Capasso I, D'Aiuto M, Rinaldo M, Douek M. Intraoperative radiotherapy in early breast cancer. Br J Surg 2015; 102:599-610. [PMID: 25787293 DOI: 10.1002/bjs.9781] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 09/17/2014] [Accepted: 01/13/2015] [Indexed: 11/07/2022]
Abstract
BACKGROUND Intraoperative radiotherapy (IORT) constitutes a paradigm shift from the conventional 3-5 weeks of whole-breast external beam radiotherapy (EBRT). IORT enables delivery of radiation at the time of excision of the breast tumour, targeting the area at highest risk of recurrence, while minimizing excessive radiation exposure to healthy breast tissue. The rationale for IORT is based on the observation that over 90 per cent of local recurrences after breast-conserving surgery occur at or near the original operation site. METHODS This article reviews trials of IORT delivered with different techniques and devices. RESULTS IORT is a very attractive option for delivering radiotherapy, reducing the traditional fractionated treatment to a single fraction administered at the time of surgery. IORT has been shown to be associated with reduced toxicity and has several potential benefits over EBRT. Only two randomized clinical trials have been published to date. The TARGIT-A and ELIOT trials have demonstrated that IORT is associated with a low rate of local recurrence, although higher than that after EBRT (TARGIT-A: 3·3 versus 1·3 per cent respectively, P = 0·042; ELIOT: 4·4 versus 0·4 per cent, P < 0·001). However, the local recurrence rate for IORT fell within the predefined 2·5 per cent non-inferiority margin in TARGIT-A, and the 7·5 per cent equivalence margin in ELIOT. CONCLUSION Longer follow-up data from existing trials, optimization of patient criteria and cost-effectiveness analyses are needed. Based on the current evidence, IORT can be offered as an alternative to EBRT to selected patients within agreed protocols, and outcomes should be monitored within national registries.
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Affiliation(s)
- E Esposito
- Research Oncology, Division of Cancer Studies, King's College London, Guy's Hospital, London, UK; Department of Breast Surgery, Istituto Nazionale per lo Studio e la cura dei tumori 'Fondazione Giovanni Pascale' - IRCCS, Naples, Italy
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Esposito E, Anninga B, Honey I, Ross G, Rainsbury D, Laws S, Rinsma S, Douek M. Is IORT ready for roll-out? Ecancermedicalscience 2015; 9:516. [PMID: 25793013 PMCID: PMC4360616 DOI: 10.3332/ecancer.2015.516] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Indexed: 11/29/2022] Open
Abstract
Two large randomised controlled trials of intraoperative radiotherapy (IORT) in breast-conserving surgery (TARGIT-A and ELIOT) have been published 14 years after their launch. Neither the TARGIT-A trial nor the ELIOT trial results have changed the current clinical practice for the use of IORT. The in-breast local recurrence rate (LRR) after IORT met the pre-specified non-inferiority margins in both trials and was 3.3% in TARGIT-A and 4.4% in the ELIOT trial. In both trials, the pre-specified estimates for local recurrence (LR) with external beam radiation therapy (EBRT) significantly overestimated actual LRR. In the TARGIT-A trial, LR with EBRT was estimated at the outset to be 6%, and in the ELIOT trial, it was estimated to be 3%. Surprisingly, LRR in the EBRT groups has been found to be significantly lower, 1.3% in the EBRT arm of the TARGIT-A and 0.4% in the EBRT arm of the ELIOT trial, respectively. Median follow-up was 2.4 years for the TARGIT-A trial and 5.8 years for the ELIOT trial. However, the initial cohort of patients in the TARGIT-A trial (reported in 2010) now have a median follow-up of 3.8 years and data on LR were available at 5 years follow-up on 35% of patients (18% who received IORT). Although further follow-up will increase confidence with the data, it will also further delay clinical implementation. By carefully weighing the risks and benefits of a single-fraction radiation treatment with patients, IORT should be offered within agreed and strict protocols. Patients deemed at low risk of LR or those deemed suitable for partial breast irradiation, according to the GEC-ESTRO and ASTRO recommendations, could be considered as candidates for IORT. These guidelines apply to all partial breast irradiation techniques, and more specific guidelines for IORT would assist clinicians.
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Affiliation(s)
- Emanuela Esposito
- Research Oncology, Division of Cancer Studies, King's College London, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK ; Department of Breast Surgery, Istituto Nazionale per lo Studio e la Cura dei Tumori 'Fondazione Giovanni Pascale' - IRCCS, Naples 80131, Italy ; Department of Clinical Medicine and Surgery, Breast Unit, University of Naples Federico II, Naples 80131, Italy
| | - Bauke Anninga
- Research Oncology, Division of Cancer Studies, King's College London, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK
| | - Ian Honey
- Department of Medical Physics Floor 3, Henriette Raphael House, Guy's and St Thomas Hospital, London SE1 9RT, UK
| | - Gillian Ross
- Clinical Oncology, Royal Marsden Hospital and Institute of Cancer Research, London SW3 6JJ, UK
| | - Dick Rainsbury
- Oncoplastic Breast Unit, Royal Hampshire County Hospital, Winchester SO22 5DG, UK
| | - Siobhan Laws
- Oncoplastic Breast Unit, Royal Hampshire County Hospital, Winchester SO22 5DG, UK
| | - Sygriet Rinsma
- Research Oncology, Division of Cancer Studies, King's College London, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK
| | - Michael Douek
- Research Oncology, Division of Cancer Studies, King's College London, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK
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Hanna GG, Kirby AM. Intraoperative radiotherapy in early stage breast cancer: potential indications and evidence to date. Br J Radiol 2015; 88:20140686. [PMID: 25734489 DOI: 10.1259/bjr.20140686] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Following early results of recent studies of intraoperative radiotherapy (IORT) in the adjuvant treatment of patients with early breast cancer, the clinical utility of IORT is a subject of much recent debate within the breast oncology community. This review describes the intraoperative techniques available, the potential indications and the evidence to date pertaining to local control and toxicity. We also discuss any implications for current practice and future research.
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Affiliation(s)
- G G Hanna
- 1 Department of Clinical Oncology, Centre for Cancer Research and Cell Biology, Queen's University of Belfast, Belfast, UK
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15
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Radiation Treatment Strategies in Patients Undergoing Breast-Conserving Surgery. CURRENT BREAST CANCER REPORTS 2015. [DOI: 10.1007/s12609-014-0171-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Intraoperative Radiotherapy: Is it Ready for Prime Time? CURRENT BREAST CANCER REPORTS 2015. [DOI: 10.1007/s12609-014-0174-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Hepel J, Wazer DE. A Flawed Study Should Not Define a New Standard of Care. Int J Radiat Oncol Biol Phys 2015; 91:255-7. [DOI: 10.1016/j.ijrobp.2014.09.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Revised: 09/13/2014] [Accepted: 09/13/2014] [Indexed: 11/25/2022]
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Silverstein MJ, Fastner G, Maluta S, Reitsamer R, Goer DA, Vicini F, Wazer D. Intraoperative radiation therapy: a critical analysis of the ELIOT and TARGIT trials. Part 2--TARGIT. Ann Surg Oncol 2014; 21:3793-9. [PMID: 25138079 PMCID: PMC4189006 DOI: 10.1245/s10434-014-3999-5] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Indexed: 11/23/2022]
Abstract
Background Two randomized intraoperative radiation therapy trials for early-stage breast cancer were recently published. The ELIOT Trial used electrons (IOERT), and the TARGIT-A Trial Update used 50-kV X-rays (IORT). These studies were compared for similarities and differences. The results were analyzed and used to determine which patients might be suitable for single-dose treatment. Methods The primary sources of data were the ELIOT Trial and TARGIT-A Trial, as well as a comprehensive analysis of the peer-reviewed literature of accelerated partial breast irradiation (APBI) using 50-kV X-rays or electrons. Studies published or presented prior to March 2014 were analyzed for efficacy, patient restrictions, complications, and outcome. Results With a median follow-up of 5.8 years, the 5-year recurrence rates for ELIOT versus EBRT patients were 4.4 and 0.4 %, respectively, p = 0.0001. A low-risk ELIOT group was identified with a 5-year recurrence rate of 1.5 %. With a median follow-up of 29 months, the 5-year recurrence rates for the TARGIT-A versus EBRT patients were 3.3 and 1.3 %, respectively, p = 0.042. Conclusions With 5.8 years of median follow-up, IOERT appears to have a subset of low risk women for whom IOERT is acceptable. With 29 months of median follow-up the results of IORT with 50-kV devices are promising, but longer follow-up data are required. At the current time, single-fraction IOERT or IORT patients should be treated under strict institutional protocols.
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