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Alcorn S, Cortés ÁA, Bradfield L, Brennan M, Dennis K, Diaz DA, Doung YC, Elmore S, Hertan L, Johnstone C, Jones J, Larrier N, Lo SS, Nguyen QN, Tseng YD, Yerramilli D, Zaky S, Balboni T. External Beam Radiation Therapy for Palliation of Symptomatic Bone Metastases: An ASTRO Clinical Practice Guideline. Pract Radiat Oncol 2024; 14:377-397. [PMID: 38788923 DOI: 10.1016/j.prro.2024.04.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 04/24/2024] [Accepted: 04/25/2024] [Indexed: 05/26/2024]
Abstract
PURPOSE This guideline provides evidence-based recommendations for palliative external beam radiation therapy (RT) in symptomatic bone metastases. METHODS The ASTRO convened a task force to address 5 key questions regarding palliative RT in symptomatic bone metastases. Based on a systematic review by the Agency for Health Research and Quality, recommendations using predefined consensus-building methodology were established; evidence quality and recommendation strength were also assessed. RESULTS For palliative RT for symptomatic bone metastases, RT is recommended for managing pain from bone metastases and spine metastases with or without spinal cord or cauda equina compression. Regarding other modalities with RT, for patients with spine metastases causing spinal cord or cauda equina compression, surgery and postoperative RT are conditionally recommended over RT alone. Furthermore, dexamethasone is recommended for spine metastases with spinal cord or cauda equina compression. Patients with nonspine bone metastases requiring surgery are recommended postoperative RT. Symptomatic bone metastases treated with conventional RT are recommended 800 cGy in 1 fraction (800 cGy/1 fx), 2000 cGy/5 fx, 2400 cGy/6 fx, or 3000 cGy/10 fx. Spinal cord or cauda equina compression in patients who are ineligible for surgery and receiving conventional RT are recommended 800 cGy/1 fx, 1600 cGy/2 fx, 2000 cGy/5 fx, or 3000 cGy/10 fx. Symptomatic bone metastases in selected patients with good performance status without surgery or neurologic symptoms/signs are conditionally recommended stereotactic body RT over conventional palliative RT. Spine bone metastases reirradiated with conventional RT are recommended 800 cGy/1 fx, 2000 cGy/5 fx, 2400 cGy/6 fx, or 2000 cGy/8 fx; nonspine bone metastases reirradiated with conventional RT are recommended 800 cGy/1 fx, 2000 cGy/5 fx, or 2400 cGy/6 fx. Determination of an optimal RT approach/regimen requires whole person assessment, including prognosis, previous RT dose if applicable, risks to normal tissues, quality of life, cost implications, and patient goals and values. Relatedly, for patient-centered optimization of treatment-related toxicities and quality of life, shared decision making is recommended. CONCLUSIONS Based on published data, the ASTRO task force's recommendations inform best clinical practices on palliative RT for symptomatic bone metastases.
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Affiliation(s)
- Sara Alcorn
- Department of Radiation Oncology, University of Minnesota, Minneapolis, Minnesota.
| | - Ángel Artal Cortés
- Department of Medical Oncology, Hospital Universitario Miguel Servet, Zaragoza, Spain
| | - Lisa Bradfield
- American Society for Radiation Oncology, Arlington, Virginia
| | | | - Kristopher Dennis
- Division of Radiation Oncology, Ottawa Hospital and University of Ottawa, Ottawa, Ontario, Canada
| | - Dayssy A Diaz
- Department of Radiation Oncology, Ohio State University, Columbus, Ohio
| | - Yee-Cheen Doung
- Department of Orthopaedics and Rehabilitation, Oregon Health and Science University, Portland, Oregon
| | - Shekinah Elmore
- Department of Radiation Oncology, University of North Carolina, Chapel Hill, North Carolina
| | - Lauren Hertan
- Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - Candice Johnstone
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Joshua Jones
- Department of Radiation Oncology, Rochester Regional Health, Rochester, New York
| | - Nicole Larrier
- Department of Radiation Oncology, Duke University Medical Center, Durham, North Carolina
| | - Simon S Lo
- Department of Radiation Oncology, University of Washington, Seattle, Washington
| | - Quynh-Nhu Nguyen
- Department of Radiation Oncology, University of Texas - MD Anderson Cancer Center, Houston, Texas
| | - Yolanda D Tseng
- Department of Radiation Oncology, University of Washington, Seattle, Washington
| | - Divya Yerramilli
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Sandra Zaky
- Department of Radiation Oncology, Stanford University, Stanford, California
| | - Tracy Balboni
- Department of Radiation Oncology, Dana-Farber/Brigham and Women's Cancer Center, Harvard Medical School, Boston, Massachusetts
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2
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Burgess L, Nguyen E, Tseng CL, Guckenberger M, Lo SS, Zhang B, Nielsen M, Maralani P, Nguyen QN, Sahgal A. Practice and principles of stereotactic body radiation therapy for spine and non-spine bone metastases. Clin Transl Radiat Oncol 2024; 45:100716. [PMID: 38226025 PMCID: PMC10788412 DOI: 10.1016/j.ctro.2023.100716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 11/23/2023] [Accepted: 12/16/2023] [Indexed: 01/17/2024] Open
Abstract
Radiotherapy is the dominant treatment modality for painful spine and non-spine bone metastases (NSBM). Historically, this was achieved with conventional low dose external beam radiotherapy, however, stereotactic body radiotherapy (SBRT) is increasingly applied for these indications. Meta-analyses and randomized clinical trials have demonstrated improved pain response and more durable tumor control with SBRT for spine metastases. However, in the setting of NSBM, there is limited evidence supporting global adoption and large scale randomized clinical trials are in need. SBRT is technically demanding requiring careful consideration of organ at risk tolerance, and strict adherence to technical requirements including immobilization, simulation, contouring and image-guidance procedures. Additional considerations include follow up practices after SBRT, with appropriate imaging playing a critical role in response assessment. Finally, there is renewed research into promising new technologies that may further refine the use of SBRT in both spinal and NSBM in the years to come.
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Affiliation(s)
- Laura Burgess
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - Eric Nguyen
- Department of Radiation Oncology, Walker Family Cancer Centre, St. Catharines, Ontario, Canada
| | - Chia-Lin Tseng
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - Matthias Guckenberger
- Department of Radiation Oncology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Simon S. Lo
- Department of Radiation Oncology, University of Washington, Seattle, WA, United States
| | - Beibei Zhang
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - Michelle Nielsen
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - Pejman Maralani
- Department of Medical Imaging, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - Quynh-Nhu Nguyen
- Department of Radiation Oncology, MD Anderson Cancer Centre, University of Texas, Houston, TX, United States
| | - Arjun Sahgal
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
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3
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Nguyen EK, Korol R, Ali S, Cumal A, Erler D, Louie AV, Nguyen TK, Poon I, Cheung P, Chu W, Soliman H, Vesprini D, Sahgal A, Chen H. Predictors of pathologic fracture and local recurrence following stereotactic body radiation therapy to 505 non-spine bone metastases. Radiother Oncol 2023; 186:109792. [PMID: 37414253 DOI: 10.1016/j.radonc.2023.109792] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 06/27/2023] [Accepted: 06/28/2023] [Indexed: 07/08/2023]
Abstract
PURPOSE Stereotactic Body Radiation Therapy (SBRT) is increasingly applied to treat non-spine bone metastases (NSBM) though data remains limited on this approach. In this retrospective study, we report outcomes and predictors of local failure (LF) and pathological fracture (PF) post-SBRT for NSBM using a mature single-institution database. METHODS Patients with NSBM treated with SBRT between 2011 and 2021 were identified. The primary objective was to assess the rates of radiographic LF. Secondary objectives were to assess the rates of in-field PF, overall survival (OS), and late grade ≥ 3 toxicity. Competing risks analysis was used to assess rates of LF and PF. Univariable regression and multivariable regression (MVR) were performed to investigate predictors of LF and PF. RESULTS A total of 373 patients with 505 NSBM were included in this study. Median follow-up was 26.5 months. The cumulative incidence of LF at 6, 12, and 24 months were 5.7%, 7.9%, and 12.6%, respectively. The cumulative incidence of PF at 6, 12, and 24 months were 3.8%, 6.1%, and 10.9%, respectively. Lytic NSBM (HR = 2.18; p < 0.01), a lower biologically effective dose (HR = 1.11 per 5 Gy10 decrease; p = 0.04), and a PTV ≥ 54 cc (HR = 4.32; p < 0.01) predicted for a higher risk of LF on MVR. Lytic NSBM (HR = 3.43; p < 0.01), mixed (lytic/sclerotic) lesions (HR = 2.70; p = 0.04), and rib metastases (HR = 2.68; p < 0.01) predicted for a higher risk of PF on MVR. CONCLUSION SBRT is an effective modality to treat NSBM with high rates of radiographic local control with an acceptable rate of PF. We identify predictors of both LF and PF that can serve to inform practice and trial design.
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Affiliation(s)
- Eric K Nguyen
- Department of Radiation Oncology, Walker Family Cancer Center, Niagara Health, St. Catharines, Ontario L2S 0A9, Canada
| | - Renee Korol
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Center, University of Toronto, Toronto, Ontario M4N 3M5, Canada
| | - Saher Ali
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Center, University of Toronto, Toronto, Ontario M4N 3M5, Canada
| | - Aaron Cumal
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Center, University of Toronto, Toronto, Ontario M4N 3M5, Canada
| | - Darby Erler
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Center, University of Toronto, Toronto, Ontario M4N 3M5, Canada
| | - Alexander V Louie
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Center, University of Toronto, Toronto, Ontario M4N 3M5, Canada
| | - Timothy K Nguyen
- Department of Radiation Oncology, London Health Sciences Center, Western University, London, Ontario N6A 5W9, Canada
| | - Ian Poon
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Center, University of Toronto, Toronto, Ontario M4N 3M5, Canada
| | - Patrick Cheung
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Center, University of Toronto, Toronto, Ontario M4N 3M5, Canada
| | - William Chu
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Center, University of Toronto, Toronto, Ontario M4N 3M5, Canada
| | - Hany Soliman
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Center, University of Toronto, Toronto, Ontario M4N 3M5, Canada
| | - Danny Vesprini
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Center, University of Toronto, Toronto, Ontario M4N 3M5, Canada
| | - Arjun Sahgal
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Center, University of Toronto, Toronto, Ontario M4N 3M5, Canada
| | - Hanbo Chen
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Center, University of Toronto, Toronto, Ontario M4N 3M5, Canada.
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Ramadan S, Arifin AJ, Nguyen TK. The Role of Post-Operative Radiotherapy for Non-Spine Bone Metastases (NSBMs). Cancers (Basel) 2023; 15:3315. [PMID: 37444424 DOI: 10.3390/cancers15133315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/15/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023] Open
Abstract
Non-spine bone metastases (NSBMs) can cause significant morbidity and deterioration in the quality of life of cancer patients. This paper reviews the role of post-operative radiotherapy (PORT) in the management of NSBMs and provides suggestions for clinical practice based on the best available evidence. We identified six retrospective studies and several reviews that examined PORT for NSBMs. These studies suggest that PORT reduces local recurrence rates and provides effective pain relief. Based on the literature, PORT was typically delivered as 20 Gy in 5 fractions or 30 Gy in 10 fractions within 5 weeks of surgery. Complete coverage of the surgical hardware is an important consideration when designing an appropriate radiation plan and leads to improved local control. Furthermore, the integration of PORT in a multidisciplinary team with input from radiation oncologists and orthopedic surgeons is beneficial. A multimodal approach including PORT should be considered for an NSBM that requires surgery. However, phase III studies are needed to answer many remaining questions and optimize the management of NSBMs.
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Affiliation(s)
- Sherif Ramadan
- Department of Radiation Oncology, London Health Sciences Centre, London, ON N6A 5W9, Canada
| | - Andrew J Arifin
- Department of Radiation Oncology, London Health Sciences Centre, London, ON N6A 5W9, Canada
| | - Timothy K Nguyen
- Department of Radiation Oncology, London Health Sciences Centre, London, ON N6A 5W9, Canada
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5
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O'Neill DE, Gannavarapu B, Hrycushko B, Folkert M, Timmerman R, Callan A. Intramedullary brachytherapy for the treatment of long bone metastatic disease: A case report. OTA Int 2023; 6:e267. [PMID: 37780184 PMCID: PMC10538573 DOI: 10.1097/oi9.0000000000000267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 01/25/2023] [Indexed: 10/03/2023]
Abstract
Case A 56-year-old woman with metastatic melanoma and femoral lesions with impending pathologic fracture was indicated for intramedullary brachytherapy (IMBT) and intramedullary nail. Conclusions IMBT + intramedullary nail is a new technique for the treatment of long bone metastases. IMBT maximizes radiation to the tumor and minimizes radiation to surrounding tissues. It allows the patient to resume systemic treatment expediently. Our cadaver model and patient were both treated for femoral metastases; however, this technique allows for the treatment of any long bone. This is a safe technique that minimizes treatment time compared with other standard radiation regimens.
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Affiliation(s)
- David Eric O'Neill
- Department of Orthopedic Surgery, UT Southwestern Medical Center, Dallas, TX; and
| | - Bhavani Gannavarapu
- Department of Radiation Oncology, UT Southwestern Medical Center, Dallas, TX
| | - Brian Hrycushko
- Department of Radiation Oncology, UT Southwestern Medical Center, Dallas, TX
| | - Michael Folkert
- Department of Radiation Oncology, UT Southwestern Medical Center, Dallas, TX
| | - Robert Timmerman
- Department of Radiation Oncology, UT Southwestern Medical Center, Dallas, TX
| | - Alexandra Callan
- Department of Orthopedic Surgery, UT Southwestern Medical Center, Dallas, TX; and
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Conde-Moreno AJ, González-Del-Alba A, López-Campos F, López López C, Requejo OH, de Castro Carpeño J, Chicas-Sett R, de Paz Arias L, Montero-Luis Á, Pérez AR, Font EF, Arija JÁA. Unravelling oligometastatic disease from the perspective of radiation and medical oncology. Part II: prostate cancer and colorectal cancer. Clin Transl Oncol 2023; 25:897-911. [PMID: 36525230 DOI: 10.1007/s12094-022-03019-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 11/18/2022] [Indexed: 12/23/2022]
Abstract
Oligometastatic disease (OMD) defines a status of cancer that is intermediate between localized and widely spread metastatic disease, and can be treated with curative intent. While imaging diagnostic tools have considerably improved in recent years, unidentified micrometastases can still escape from current detection techniques allowing disease to progress. The variety of OMD scenarios are mainly defined by the number of metastases, the biological and molecular tumour profiles, and the timing of the development of metastases. Increasing knowledge has contributed to the earlier and improved detection of OMD, underlining the importance of an early disease control. Based on increasing detection rates of OMD in the current real clinical practice and the lack of standardized evidence-based guidelines to treat this cancer status, a board of experts from the Spanish Societies of Radiation Oncology (SEOR) and Medical Oncology (SEOM) organized a series of sessions to update the current state-of-the-art on OMD from a multidisciplinary perspective, and to discuss how results from clinical studies may translate into promising treatment options. This experts' review series summarizes what is known and what it is pending clarification in the context of OMD in the scenarios of Non-Small Cell Lung Cancer and Breast Cancer (Part I), and Prostate Cancer and Colorectal Cancer (Part II), aiming to offer specialists a pragmatic framework that might contribute to the improved management of patients.
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Affiliation(s)
- Antonio José Conde-Moreno
- Radiation Oncology Department, Hospital Universitari i Politècnic La Fe, Avinguda de Fernando Abril Martorell, 106, 46026, Valencia, Spain.
| | | | | | - Carlos López López
- Medical Oncology Department, Hospital Universitario Marqués de Valdecilla, IDIVAL, Santander, Spain
| | | | | | | | - Laura de Paz Arias
- Medical Oncology Department, Complejo Hospitalario Universitario de Ferrol, La Coruña, Spain
| | - Ángel Montero-Luis
- Radiation Oncology Department, Hospital Universitario HM Sanchinarro, Madrid, Spain
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Palliative Efficacy of High-Dose Stereotactic Body Radiotherapy Versus Conventional Radiotherapy for Painful Non-Spine Bone Metastases: A Propensity Score-Matched Analysis. Cancers (Basel) 2022; 14:cancers14164014. [PMID: 36011008 PMCID: PMC9406761 DOI: 10.3390/cancers14164014] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 08/09/2022] [Accepted: 08/18/2022] [Indexed: 12/04/2022] Open
Abstract
(1) Background: The superiority of stereotactic body radiotherapy (SBRT) over conventional external beam radiotherapy (cEBRT) in terms of pain palliation for bone metastases remains controversial. (2) Methods: This propensity score-matched study compared the overall pain response (OR) 3 months after radiotherapy among patients with painful (≥2 points on a 0-to-10 scale) non-spine bone metastases. Patients with lesions that were treated with SBRT or cEBRT and whose pain scores were evaluated 3 months after radiotherapy were included in this study. Pain response was evaluated according to the International Consensus Criteria. (3) Results: A total of 234 lesions (SBRT, n = 129; cEBRT, n = 105) were identified in our institutional database. To reduce the confounding effects, 162 patients were selected using a propensity score-matched analysis (n = 81 for each treatment). The OR rate at 3 months after SBRT was significantly higher than that after cEBRT (76.5% vs. 56.8%; p = 0.012). A noteworthy finding of our study is that the same trend was observed even after 6 months (75.9% vs. 50.0%; p = 0.011). The 1-year local failure rates after SBRT and cEBRT were 10.2% and 33.3% (p < 0.001), respectively. (4) Conclusions: Our findings suggest that SBRT is superior to cEBRT for pain palliation in patients with non-spine bone metastases.
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Lopez-Campos F, Cacicedo J, Couñago F, García R, Leaman-Alcibar O, Navarro-Martin A, Pérez-Montero H, Conde-Moreno A. SEOR SBRT-SG stereotactic body radiation therapy consensus guidelines for non-spine bone metastasis. Clin Transl Oncol 2021; 24:215-226. [PMID: 34633602 DOI: 10.1007/s12094-021-02695-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Accepted: 08/11/2021] [Indexed: 12/31/2022]
Abstract
The use of stereotactic body radiation therapy (SBRT) to treat non-spine bone metastases (NSBM) is becoming increasingly common in clinical practice. The clinical advantages of SBRT include good pain control and high local control rates, although only limited data are available. The Spanish Society of Radiation Oncology (SEOR) SBRT group recently convened a task force of experts in the field to address key questions related to SBRT for NSBM, including treatment indications, planning, techniques, and dose fractionation. The task force reviewed the available literature to develop evidence-based recommendations for the safe application of NSBM SBRT and to standardize and optimize SBRT processes. The present document provides a comprehensive analysis of the available data, including ongoing clinical trials and controversies, providing clinically applicable recommendations.
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Affiliation(s)
- F Lopez-Campos
- Radiation Oncology Department, Hospital Universitario Ramón y Cajal, Madrid, Spain.
| | - J Cacicedo
- Radiation Oncology Department, Osakidetza/Biocruces Bizkaia Health Research Institute, Hospital Universitario Cruces, Barakaldo, Spain.,Department of Surgery, Radiology and Physical Medicine of the University of the Basque Country (UPV/EHU), Vizcaya, Spain
| | - F Couñago
- Radiation Oncology Department, Hospital Universitario Quirón Salud, Hospital La Luz, Madrid, Universidad Europea de Madrid (UEM), Madrid, Spain
| | - R García
- Radiation Oncology Department, Hospital Ruber Internacional Madrid, Madrid, Spain
| | - O Leaman-Alcibar
- Radiation Oncology Department, Hospital General Universitario Gregorio Marañon, Madrid, Spain
| | - A Navarro-Martin
- Radiation Oncology Department, Institut Català d'Oncologia, Hospital Duran i Reynals, Barcelona, Spain
| | - H Pérez-Montero
- Radiation Oncology Department, Institut Català d'Oncologia, Hospital Duran i Reynals, Barcelona, Spain
| | - A Conde-Moreno
- Radiation Oncology Department, Hospital Universitario y Politécnico La Fe, Valencia, CEU Cardenal Herrera University, Castellón, Spain
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9
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Ito K, Hirai T, Yujiro N, Okuma T. Novel approach involving stereotactic body radiotherapy followed by intramedullary nail placement for long bone metastases: a case report. Clin Exp Metastasis 2021; 38:425-427. [PMID: 34052935 DOI: 10.1007/s10585-021-10105-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 05/28/2021] [Indexed: 12/25/2022]
Affiliation(s)
- Kei Ito
- Division of Radiation Oncology, Department of Radiology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, 3-18-22 Honkomagome, Bunkyo-ku, Tokyo, 113-8677, Japan.
| | - Toshihide Hirai
- Department of Musculoskeletal Oncology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, 3-18-22 Honkomagome, Bunkyo-ku, Tokyo, 113-8677, Japan
| | - Nakajima Yujiro
- Division of Radiation Oncology, Department of Radiology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, 3-18-22 Honkomagome, Bunkyo-ku, Tokyo, 113-8677, Japan
| | - Tomotake Okuma
- Department of Musculoskeletal Oncology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, 3-18-22 Honkomagome, Bunkyo-ku, Tokyo, 113-8677, Japan
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