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Kang NK, Sung SY, Kim SH, Jeon YW, Suh YJ, Lee JH. Hypofractionated Partial Breast Irradiation With Intensity-Modulated Radiotherapy in Early Breast Cancer or Carcinoma In Situ: An Investigational Short-Term Analysis. J Breast Cancer 2024; 27:79-90. [PMID: 38529590 PMCID: PMC11065498 DOI: 10.4048/jbc.2023.0296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/12/2024] [Accepted: 03/21/2024] [Indexed: 03/27/2024] Open
Abstract
PURPOSE This study aimed to analyze the treatment outcomes and adverse effects of moderately hypofractionated partial breast irradiation (PBI) in patients with early breast cancer. METHODS In total, 473 patients with early breast cancer or carcinoma in situ were diagnosed with Tis or T1N0 disease and underwent PBI following breast-conserving surgery. All histologic tumor types, close surgical margins within 1 mm of the tumor, and multifocal tumors were included in this study. A radiation dose of 50 Gy in 20 fractions was delivered over 4 weeks using intensity-modulated radiotherapy technique. Dosimetric data, recurrence patterns, survival outcomes, and adverse events were retrospectively analyzed. RESULTS During a median follow-up of 28.9 months, seven patients (1.5%) experienced ipsilateral breast tumor recurrence (IBTR). Two patients had regional recurrence, four patients developed contralateral breast cancer, and no distant metastases were observed. The locoregional recurrence rate in the ipsilateral breast was 1.8%. Two deaths occurred during the follow-up period, but were not attributed to breast cancer. The 2-year disease-free survival and 2-year overall survival rates were was 94.0% and 99.8%, respectively. Acute adverse events occurred in 131 patients (27.1%), and were distributed among all grades, with only two patients (0.4%) experiencing grade 3 events. Late adverse events were noted in 16 patients (3.4%), and were distributed among all grades, including grade 3 events in four patients (0.8%). No grade 4 or 5 events were observed. CONCLUSION Hypofractionated PBI demonstrated favorable IBTR rates in patients with early breast cancer, with low incidence of acute and late toxicities in the short-term analysis.
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Affiliation(s)
- Nam Kyu Kang
- Department of Radiation Oncology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Soo-Yoon Sung
- Department of Radiation Oncology, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Sung Hwan Kim
- Department of Radiation Oncology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Ye Won Jeon
- Department of Surgery, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Young Jin Suh
- Department of Surgery, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jong Hoon Lee
- Department of Radiation Oncology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
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Mills MN, Russo NW, Fahey M, Nanda RH, Raiker S, Jastrzebski J, Stout LL, Wilson JP, Altoos TA, Allen KG, Blumencranz PW, Diaz R. Increased Risk for Ipsilateral Breast Tumor Recurrence in Invasive Lobular Carcinoma after Accelerated Partial Breast Irradiation Brachytherapy. Oncologist 2021; 26:e1931-e1938. [PMID: 34516030 DOI: 10.1002/onco.13980] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 09/06/2021] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND The suitability criteria for accelerated partial breast irradiation (APBI) from the American Brachytherapy Society (ABS), American Society for Radiation Oncology (ASTRO), and The Groupe Européende Curiethérapie European SocieTy for Radiotherapy & Oncology (GEC-ESTRO) have significant differences. MATERIALS AND METHODS This is a single institution retrospective review of 946 consecutive patients with invasive breast cancer who underwent lumpectomy and APBI intracavitary brachytherapy from 2003 to 2018. Overall survival (OS), breast cancer-specific survival (BCSS), relapse-free survival (RFS), and ipsilateral breast tumor recurrence (IBTR) were estimated with Kaplan-Meier method. RESULTS Median follow-up time was 60.2 months. Median age was 68 years (46-94 years). The majority of patients had estrogen receptor (ER)-positive disease (94%). There were 821 (87%) cases of invasive ductal carcinoma and 68 cases (7%) of invasive lobular carcinoma (ILC). The 5-year OS, BCSS, RFS, and IBTR were 93%, 99%, 90%, and 1.5%, respectively. Upon univariate analysis, ILC (hazard ratio [HR], 4.6; p = .008) and lack of nodal evaluation (HR, 6.9; p = .01) were risk factors for IBTR. The 10-year IBTR was 2.5% for IDC and 14% for ILC. While the ABS and ASTRO criteria could not predict IBTR, the GEC-ESTRO intermediate risk group was associated with inferior IBTR (p = .04) when compared to both low risk and high risk groups. None of the suitability criteria was able to predict RFS. CONCLUSION These results show that APBI is an effective treatment for patients with invasive breast cancer. Expansion of the current eligibility criteria should be considered, although prospective validation is needed. Caution is required when considering APBI for patients with ILC. IMPLICATIONS FOR PRACTICE In a large retrospective review of 946 patients with early breast cancer treated with partial mastectomy and accelerated partial breast irradiation (APBI) intracavitary brachytherapy, this study demonstrates durable local control. Patients deemed unsuitable or high risk by the American Brachytherapy Society, American Society for Radiation Oncology, and European Society for Radiotherapy and Oncology guidelines were not at increased risk for ipsilateral breast tumor recurrence (IBTR), suggesting that expansion of the current criteria should be considered. Importantly, however, these results demonstrate that caution should be taken when considering APBI for patients with invasive lobular carcinoma, as these patients had relatively high risk for IBTR (10-year IBTR, 14%).
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Affiliation(s)
- Matthew N Mills
- Department of Radiation Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - Nicholas W Russo
- Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
| | - Matthew Fahey
- Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
| | - Ronica H Nanda
- Department of Radiation Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | | | | | | | - Jason P Wilson
- Comprehensive Breast Cancer Center of Tampa Bay, Morton Plant Hospital, Clearwater, Florida, USA
| | | | - Kathleen G Allen
- Comprehensive Breast Cancer Center of Tampa Bay, Morton Plant Hospital, Clearwater, Florida, USA
| | - Peter W Blumencranz
- Comprehensive Breast Cancer Center of Tampa Bay, Morton Plant Hospital, Clearwater, Florida, USA
| | - Roberto Diaz
- Department of Radiation Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
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Yang C, Lei C, Zhang Y, Zhang J, Ji F, Pan W, Zhang L, Gao H, Yang M, Li J, Wang K. Comparison of Overall Survival Between Invasive Lobular Breast Carcinoma and Invasive Ductal Breast Carcinoma: A Propensity Score Matching Study Based on SEER Database. Front Oncol 2020; 10:590643. [PMID: 33415073 PMCID: PMC7783385 DOI: 10.3389/fonc.2020.590643] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 11/13/2020] [Indexed: 11/22/2022] Open
Abstract
Objective Invasive lobular carcinoma (ILC) and invasive ductal carcinoma (IDC) account for most breast cancers. However, the overall survival (OS) differences between ILC and IDC remain controversial. This study aimed to compare nonmetastatic ILC to IDC in terms of survival and prognostic factors for ILC. Methods This retrospective cohort study used data from the Surveillance, Epidemiology and End Results (SEER) Cancer Database (www.seer.cancer.gov). Women diagnosed with nonmetastatic ILC and IDC between 2006 and 2016 were included. A propensity score matching (PSM) method was used in our analysis to reduce baseline differences in clinicopathological characteristics and survival outcomes. Kaplan-Meier curves and log-rank test were used for survival analysis. Results Compared to IDC patients, ILC patients were diagnosed later in life with poorly differentiated and larger lesions, as well as increased expression of estrogen receptors (ERs) and/or progesterone receptors (PRs). A lower rate of radiation therapy and chemotherapy was observed in ILC. After PSM, ILC, and IDC patients exhibited similar OS (HR=1.017, p=0.409, 95% CI: 0.967–1.069). In subgroup analysis of HR-negative, AJCC stage III, N2/N3 stage patients, or those who received radiotherapy, ILC patients exhibited worse OS compared to IDC patients. Furthermore, multivariate analysis revealed a 47% survival benefit for IDC compared to ILC in HR-negative patients who received chemotherapy (HR=1.47, p=0.01, 95% CI: 1.09–1.97). Conclusions Our results demonstrated that ILC and IDC patients had similar OS after PSM. However, ILC patients with high risk indicators had worse OS compared to IDC patients by subgroup analysis.
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Affiliation(s)
- Ciqiu Yang
- Department of Breast Cancer, Cancer Center, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Chuqian Lei
- Department of Breast Cancer, Cancer Center, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China.,Department of Breast and Thyroid Surgery, The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - Yi Zhang
- Department of Breast Cancer, Cancer Center, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Junsheng Zhang
- Department of Breast Cancer, Cancer Center, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Fei Ji
- Department of Breast Cancer, Cancer Center, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Weijun Pan
- Department of Breast Cancer, Cancer Center, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Liulu Zhang
- Department of Breast Cancer, Cancer Center, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Hongfei Gao
- Department of Breast Cancer, Cancer Center, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Mei Yang
- Department of Breast Cancer, Cancer Center, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Jieqing Li
- Department of Breast Cancer, Cancer Center, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Kun Wang
- Department of Breast Cancer, Cancer Center, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
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Outcomes of Breast Cancer (Invasive Lobular and Ductal Carcinoma) Treated with Boost Intraoperative Electron Radiotherapy Versus Conventional External Beam Radiotherapy. INTERNATIONAL JOURNAL OF CANCER MANAGEMENT 2019. [DOI: 10.5812/ijcm.84850] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kowalchuk RO, Romano KD, Trifiletti DM, Dutta SW, Showalter TN, Morris MM. Preliminary toxicity results using partial breast 3D-CRT with once daily hypo-fractionation and deep inspiratory breath hold. Radiat Oncol 2018; 13:135. [PMID: 30053864 PMCID: PMC6064058 DOI: 10.1186/s13014-018-1079-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 07/17/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND To evaluate the clinical outcomes of patients treated with 3D conformal Hypo-fractionated, deep Inspiratory breath-hold (DIBH), Partial breast radiotherapy, termed "HIP." HIP was implemented to merge the schedule of once-daily breast hypofractionation with partial breast treatment. METHODS We identified 38 breast cancers in 37 patients from 2013 to 2014 treated at our institution with HIP following lumpectomy for early stage breast cancer. Patients received a hypo-fractionated course (≤ 20 fractions) of once daily radiation to the partial breast (lumpectomy cavity + margin) utilizing DIBH regardless of laterality. Clinical and treatment-related characteristics were obtained, including target volume and organ at risk (OAR) dosimetric characteristics. Patients were followed clinically and with at least yearly mammograms for up to 36 months (range 5-36 months). Acute and late toxicity was scored using the Common Terminology Criteria for Adverse Events (CTCAE) v4.03. RESULTS Patients received a median dose of 42.56 Gy in 16 Fractions (Fx) (range 40.05-53.2 Gy; and 15-20 Fx). OAR doses were low, with a mean heart dose of 0.37 Gy, an ipsilateral lung V20 mean of 4%, and a contralateral lung V5 of 1%. Acute toxicity (≤ grade 2) was present in 79% (n = 30) of the cases, with dermatitis being the most common finding (63%). Late grade 1-2 toxicity was present in 42% (n = 16) of the cases, with hyperpigmentation being the most common finding (n = 9). There were no severe acute or late toxicities (≥ grade 3). At a median follow up of 21 months, there were no local, regional, or distant failures. CONCLUSIONS We report limited toxicity in this low risk cohort of patients with early stage breast cancer treated with HIP, a unique and logical combination of 3-D conformal external beam radiotherapy, moderate hypo-fractionation, and DIBH.
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Affiliation(s)
- Roman O. Kowalchuk
- Department of Radiation Oncology, University of Virginia, 1240 Lee Street, Box 800383, Charlottesville, VA 22908 USA
| | - Kara D. Romano
- Department of Radiation Oncology, University of Virginia, 1240 Lee Street, Box 800383, Charlottesville, VA 22908 USA
| | - Daniel M. Trifiletti
- Department of Radiation Oncology, University of Virginia, 1240 Lee Street, Box 800383, Charlottesville, VA 22908 USA
| | - Sunil W. Dutta
- Department of Radiation Oncology, University of Virginia, 1240 Lee Street, Box 800383, Charlottesville, VA 22908 USA
| | - Timothy N. Showalter
- Department of Radiation Oncology, University of Virginia, 1240 Lee Street, Box 800383, Charlottesville, VA 22908 USA
| | - Monica M. Morris
- Department of Radiation Oncology, University of Virginia, 1240 Lee Street, Box 800383, Charlottesville, VA 22908 USA
- Department of Radiation Oncology, Virginia Commonwealth University, Richmond, VA USA
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Intraoperative Electron Radiotherapy (IOERT) Boost Versus External Beam
Radiotherapy (EBRT) Boost in Invasive Lobular Carcinoma Breast Cancer
Cases. INTERNATIONAL JOURNAL OF CANCER MANAGEMENT 2018. [DOI: 10.5812/ijcm.69364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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The American Brachytherapy Society consensus statement for accelerated partial-breast irradiation. Brachytherapy 2018; 17:154-170. [DOI: 10.1016/j.brachy.2017.09.004] [Citation(s) in RCA: 98] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 09/11/2017] [Accepted: 09/18/2017] [Indexed: 12/29/2022]
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Leonardi MC, Maisonneuve P, Mastropasqua MG, Cattani F, Fanetti G, Morra A, Lazzari R, Bazzani F, Caputo M, Rotmensz N, Gerardi MA, Ricotti R, Enrica Galimberti V, Veronesi P, Dicuonzo S, Viale G, Jereczek-Fossa BA, Orecchia R. Comparison of Treatment Outcome Between Invasive Lobular and Ductal Carcinomas in Patients Receiving Partial Breast Irradiation With Intraoperative Electrons. Int J Radiat Oncol Biol Phys 2017; 99:173-181. [DOI: 10.1016/j.ijrobp.2017.04.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 03/16/2017] [Accepted: 04/21/2017] [Indexed: 10/19/2022]
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Trifiletti DM, Romano KD, Showalter SL, Reardon KA, Libby B, Showalter TN. Accelerated partial breast irradiation with brachytherapy: patient selection and technique considerations. BREAST CANCER-TARGETS AND THERAPY 2015; 7:211-21. [PMID: 26251627 PMCID: PMC4524268 DOI: 10.2147/bctt.s55860] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Accelerated partial breast irradiation (APBI) through breast brachytherapy is a relatively recent development in breast radiotherapy that has gained international favor because of its reduction in treatment duration and normal tissue irradiation while maintaining favorable cancer-specific and cosmetic outcomes. Despite the fact that several large national trials have not reported final results yet, many providers are currently offering APBI to select patients and APBI is listed as a treatment option for selecting patients in the National Comprehensive Cancer Network guidelines. Multiple consensus guidelines exist in selecting patients for APBI, some with conflicting recommendations. In this review, the existing patient selection guidelines are reported, compared, and critiqued, grouping them in helpful subcategories. Unique patient and technical selection factors for APBI with brachytherapy are explored.
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Affiliation(s)
- Daniel M Trifiletti
- Department of Radiation Oncology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Kara D Romano
- Department of Radiation Oncology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Shayna L Showalter
- Division of Surgical Oncology, Department of Surgery, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Kelli A Reardon
- Department of Radiation Oncology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Bruce Libby
- Department of Radiation Oncology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Timothy N Showalter
- Department of Radiation Oncology, University of Virginia School of Medicine, Charlottesville, VA, USA
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New Therapeutic Approaches for Invasive Lobular Carcinoma. CURRENT BREAST CANCER REPORTS 2014. [DOI: 10.1007/s12609-014-0158-8] [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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Impact of the Number of Cautionary and/or Unsuitable Risk Factors on Outcomes After Accelerated Partial Breast Irradiation. Int J Radiat Oncol Biol Phys 2013; 87:134-8. [DOI: 10.1016/j.ijrobp.2013.05.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Revised: 05/01/2013] [Accepted: 05/15/2013] [Indexed: 11/19/2022]
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Cannon DM, McHaffie DR, Patel RR, Adkison JB, Das RK, Anderson BD, Geye HM, Bentzen SM, Cannon GM. Locoregional Recurrence Following Accelerated Partial Breast Irradiation for Early-Stage Invasive Breast Cancer: Significance of Estrogen Receptor Status and Other Pathological Variables. Ann Surg Oncol 2013; 20:3446-52. [DOI: 10.1245/s10434-013-3015-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Indexed: 12/31/2022]
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Shah C, Vicini F, Wazer DE, Arthur D, Patel RR. The American Brachytherapy Society consensus statement for accelerated partial breast irradiation. Brachytherapy 2013; 12:267-77. [PMID: 23619524 DOI: 10.1016/j.brachy.2013.02.001] [Citation(s) in RCA: 130] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Revised: 01/21/2013] [Accepted: 02/01/2013] [Indexed: 01/08/2023]
Abstract
PURPOSE To develop clinical guidelines for the quality practice of accelerated partial breast irradiation (APBI) as part of breast-conserving therapy for women with early-stage breast cancer. METHODS AND MATERIALS Members of the American Brachytherapy Society with expertise in breast cancer and breast brachytherapy in particular devised updated guidelines for appropriate patient evaluation and selection based on an extensive literature search and clinical experience. RESULTS Increasing numbers of randomized and single and multi-institution series have been published documenting the efficacy of various APBI modalities. With more than 10-year followup, multiple series have documented excellent clinical outcomes with interstitial APBI. Patient selection for APBI should be based on a review of clinical and pathologic factors by the clinician with particular attention paid to age (≥50 years old), tumor size (≤3cm), histology (all invasive subtypes and ductal carcinoma in situ), surgical margins (negative), lymphovascular space invasion (not present), and nodal status (negative). Consistent dosimetric guidelines should be used to improve target coverage and limit potential for toxicity following treatment. CONCLUSIONS These guidelines have been created to provide clinicians with appropriate patient selection criteria to allow clinicians to use APBI in a manner that will optimize clinical outcomes and patient satisfaction. These guidelines will continue to be evaluated and revised as future publications further stratify optimal patient selection.
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Affiliation(s)
- Chirag Shah
- Department of Radiation Oncology, Washington University School of Medicine, Saint Louis, MO, USA
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Dorn PL, Al-Hallaq HA, Haq F, Goldberg M, Abe H, Hasan Y, Chmura SJ. A prospective study of the utility of magnetic resonance imaging in determining candidacy for partial breast irradiation. Int J Radiat Oncol Biol Phys 2013; 85:615-22. [PMID: 22836047 PMCID: PMC4280848 DOI: 10.1016/j.ijrobp.2012.06.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 06/01/2012] [Accepted: 06/11/2012] [Indexed: 11/30/2022]
Abstract
PURPOSE Retrospective data have demonstrated that breast magnetic resonance imaging (MRI) may change a patient's eligibility for partial breast irradiation (PBI) by identifying multicentric, multifocal, or contralateral disease. The objective of the current study was to prospectively determine the frequency with which MRI identifies occult disease and to establish clinical factors associated with a higher likelihood of MRI prompting changes in PBI eligibility. METHODS AND MATERIALS At The University of Chicago, women with breast cancer uniformly undergo MRI in addition to mammography and ultrasonography. From June 2009 through May 2011, all patients were screened prospectively in a multidisciplinary conference for PBI eligibility based on standard imaging, and the impact of MRI on PBI eligibility according to National Surgical Adjuvant Breast and Bowel Project protocol B-39/Radiation Therapy Oncology Group protocol 0413 entry criteria was recorded. Univariable analysis was performed using clinical characteristics in both the prospective cohort and in a separate cohort of retrospectively identified patients. Pooled analysis was used to derive a scoring index predictive of the risk that MRI would identify additional disease. RESULTS A total of 521 patients were screened for PBI eligibility, and 124 (23.8%) patients were deemed eligible for PBI based on standard imaging. MRI findings changed PBI eligibility in 12.9% of patients. In the pooled univariable analysis, tumor size ≥ 2 cm on mammography or ultrasonography (P=.02), age <50 years (P=.01), invasive lobular histology (P=.01), and HER-2/neu amplification (P=.01) were associated with a higher likelihood of MRI changing PBI eligibility. A predictive score was generated by summing the number of significant risk factors. Patients with a score of 0, 1, 2, and 3 had changes to eligibility based on MRI findings in 2.8%, 13.2%, 38.1%, and 100%, respectively (P<.0001). CONCLUSIONS MRI identified additional disease in a significant number of patients eligible for PBI, based on standard imaging. Clinical characteristics may be useful in directing implementation of MRI in the staging of PBI candidates.
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Affiliation(s)
- Paige L. Dorn
- Department of Radiation and Cellular Oncology, University of Chicago Medical Center, Chicago, Illinois
| | - Hania A. Al-Hallaq
- Department of Radiation and Cellular Oncology, University of Chicago Medical Center, Chicago, Illinois
| | - Farah Haq
- Department of Radiation and Cellular Oncology, University of Chicago Medical Center, Chicago, Illinois
| | - Mira Goldberg
- Department of Radiation and Cellular Oncology, University of Chicago Medical Center, Chicago, Illinois
| | - Hiroyuki Abe
- Department of Radiology, University of Chicago Medical Center, Chicago, Illinois
| | - Yasmin Hasan
- Department of Radiation and Cellular Oncology, University of Chicago Medical Center, Chicago, Illinois
| | - Steven J. Chmura
- Department of Radiation and Cellular Oncology, University of Chicago Medical Center, Chicago, Illinois
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15
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Moser EC, Vrieling C. Accelerated partial breast irradiation: the need for well-defined patient selection criteria, improved volume definitions, close follow-up and discussion of salvage treatment. Breast 2012; 21:707-15. [PMID: 23127279 DOI: 10.1016/j.breast.2012.09.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2012] [Revised: 08/17/2012] [Accepted: 09/23/2012] [Indexed: 12/24/2022] Open
Abstract
Breast-conserving therapy, including whole breast irradiation, has become a well-established alternative to mastectomy in early-stage breast cancer patients, with similar survival rates and better cosmetic outcome. However, many women are still treated with mastectomy, due to logistical issues related to the long course of radiotherapy (RT). To reduce mastectomy rates and/or omission of RT after breast-conserving surgery, shorter, hypofractionated RT treatments have been introduced. More recently, the necessity of routinely treating the entire breast in all patients has been questioned, leading to the development of partial breast radiotherapy. With accelerated partial breast irradiation (APBI) these two approaches have been combined: the tumor bed with a 1-2 cm margin is irradiated either intra-operatively (single fraction) or postoperatively over 5-15 days. Different techniques have been developed, including interstitial brachytherapy, intra-cavity brachytherapy, intra-operative radiotherapy and external beam radiotherapy. These techniques are being evaluated in several ongoing phase III studies. Since its introduction, APBI has been the subject of continuous debate. ASTRO and GEC-ESTRO have published guidelines for patient selection for APBI, and strongly recommend that APBI be carried out within ongoing clinical trials. Recently, the patient selection criteria for APBI have also been up for debate, following the publication of results from different groups that do/do not confirm a difference in recurrence risk among the ASTRO defined risk groups. This paper reviews the different APBI techniques, current recommendations for patient selection, available clinical data and ongoing clinical trials. A case report is included to illustrate the need for careful follow-up of patients treated with APBI.
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Affiliation(s)
- Elizabeth C Moser
- Breast Unit/Department of Radiotherapy, Champalimaud Cancer Centre, Lisbon, Portugal.
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