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Saifi O, Hoppe BS. Contemporary radiation therapy use in Hodgkin lymphoma. Semin Hematol 2024:S0037-1963(24)00070-2. [PMID: 38897840 DOI: 10.1053/j.seminhematol.2024.05.006] [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: 04/17/2024] [Revised: 05/08/2024] [Accepted: 05/27/2024] [Indexed: 06/21/2024]
Abstract
Radiation therapy assumes a pivotal role in Hodgkin lymphoma management, especially within combined modality therapy. It serves as a cornerstone in early-stage disease and in mitigating high-risk instances of local relapse in advanced stages. Over recent decades, radiation therapy has undergone significant advancements, notably alongside diagnostic imaging improvements, facilitating the reduction of radiation field size and dosage. This progress has notably led to minimized toxicity while upholding treatment efficacy. This comprehensive review extensively evaluates the indications and advancements in radiation therapy for Hodgkin lymphoma, with a primary focus on enhancing treatment efficacy while minimizing radiation-related toxicities. The exploration encompasses a detailed examination of various radiation fields, techniques and delivery modalities employed in Hodgkin lymphoma treatment, including intensity-modulated radiation therapy (IMRT), volumetric modulated arc therapy (VMAT), and proton therapy. It delves into the intricacies of optimal dose selection and treatment planning strategies aimed at achieving maximal disease control while concurrently minimizing the risk of long-term side effects.
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Affiliation(s)
- Omran Saifi
- Department of Radiation Oncology, Mayo Clinic, Jacksonville, FL
| | - Bradford S Hoppe
- Department of Radiation Oncology, Mayo Clinic, Jacksonville, FL.
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Broder BA, Aulwes EF, Espy M, Merrill FE, Sidebottom RB, Tupa D, Freeman MS. A TOPAS model for lens-based proton radiography. Biomed Phys Eng Express 2023; 9:065026. [PMID: 37812911 DOI: 10.1088/2057-1976/ad015b] [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: 08/11/2023] [Accepted: 10/09/2023] [Indexed: 10/11/2023]
Abstract
Objective.Proton Radiography can be used in conjunction with proton therapy for patient positioning, real-time estimates of stopping power, and adaptive therapy in regions with motion. The modeling capability shown here can be used to evaluate lens-based radiography as an instantaneous proton-based radiographic technique. The utilization of user-friendly Monte Carlo program TOPAS enables collaborators and other users to easily conduct medical- and therapy- based simulations of the Los Alamos Neutron Science Center (LANSCE). The resulting transport model is an open-source Monte Carlo package for simulations of proton and heavy ion therapy treatments and concurrent particle imaging.Approach.The four-quadrupole, magnetic lens system of the 800-MeV proton beamline at LANSCE is modeled in TOPAS. Several imaging and contrast objects were modelled to assess transmission at energies from 230-930 MeV and different levels of particle collimation. At different proton energies, the strength of the magnetic field was scaled according toβγ,the inverse product of particle relativistic velocity and particle momentum.Main results.Materials with high atomic number, Z, (gold, gallium, bone-equivalent) generated more contrast than materials with low-Z (water, lung-equivalent, adipose-equivalent). A 5-mrad collimator was beneficial for tissue-to-contrast agent contrast, while a 10-mrad collimator was best to distinguish between different high-Z materials. Assessment with a step-wedge phantom showed water-equivalent path length did not scale directly according to predicted values but could be mapped more accurately with calibration. Poor image quality was observed at low energies (230 MeV), but improved as proton energy increased, with sub-mm resolution at 630 MeV.Significance.Proton radiography becomes viable for shallow bone structures at 330 MeV, and for deeper structures at 630 MeV. Visibility improves with use of high-Z contrast agents. This modality may be particularly viable at carbon therapy centers with accelerators capable of delivering high energy protons and could be performed with carbon therapy.
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Affiliation(s)
- Brittany A Broder
- The University of Chicago, 5841 South Ellis Avenue, Chicago, IL 60637, United States of America
| | - Ethan F Aulwes
- Los Alamos National Laboratory, Los Alamos, NM, 87545, United States of America
| | - Michelle Espy
- Los Alamos National Laboratory, Los Alamos, NM, 87545, United States of America
| | - Frank E Merrill
- Los Alamos National Laboratory, Los Alamos, NM, 87545, United States of America
| | - Rachel B Sidebottom
- The University of New Mexico, Albuquerque, NM 87131, United States of America
| | - Dale Tupa
- Los Alamos National Laboratory, Los Alamos, NM, 87545, United States of America
| | - Matthew S Freeman
- Los Alamos National Laboratory, Los Alamos, NM, 87545, United States of America
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Sidebottom RB, Allison JC, Aulwes EF, Broder BA, Freeman MS, Magnelind PE, Mariam FG, Merrill FE, Neukirch LP, Schurman T, Sinnis J, Tang Z, Tupa D, Tybo JL, Wilde CH, Espy M. Contrast-enhanced proton radiographic sensitivity limits for tumor detection. J Med Imaging (Bellingham) 2021; 8:053501. [PMID: 34708145 DOI: 10.1117/1.jmi.8.5.053501] [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: 12/08/2020] [Accepted: 10/11/2021] [Indexed: 11/14/2022] Open
Abstract
Purpose: Proton radiography may guide proton therapy cancer treatments with beam's-eye-view anatomical images and a proton-based estimation of proton stopping power. However, without contrast enhancement, proton radiography will not be able to distinguish tumor from tissue. To provide this contrast, functionalized, high- Z nanoparticles that specifically target a tumor could be injected into a patient before imaging. We conducted this study to understand the ability of gold, as a high- Z , biologically compatible tracer, to differentiate tumors from surrounding tissue. Approach: Acrylic and gold phantoms simulate a tumor tagged with gold nanoparticles (AuNPs). Calculations correlate a given thickness of gold to levels of tumor AuNP uptake reported in the literature. An identity, × 3 , and × 7 proton magnifying lens acquired lens-refocused proton radiographs at the 800-MeV LANSCE proton beam. The effects of gold in the phantoms, in terms of percent density change, were observed as changes in measured transmission. Variable areal densities of acrylic modeled the thickness of the human body. Results: A 1 - μ m -thick gold strip was discernible within 1 cm of acrylic, an areal density change of 0.2%. Behind 20 cm of acrylic, a 40 - μ m gold strip was visible. A 1-cm-diameter tumor tagged with 1 × 10 5 50-nm AuNPs per cell has an amount of contrast agent embedded within it that is equivalent to a 65 - μ m thickness of gold, an areal density change of 0.63% in a tissue thickness of 20 cm, which is expected to be visible in a typical proton radiograph. Conclusions: We indicate that AuNP-enhanced proton radiography might be a feasible technology to provide image-guidance to proton therapy, potentially reducing off-target effects and sparing nearby tissue. These data can be used to develop treatment plans and clinical applications can be derived from the simulations.
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Affiliation(s)
| | - Jason C Allison
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States
| | - Ethan F Aulwes
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States
| | - Brittany A Broder
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States
| | - Matthew S Freeman
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States
| | - Per E Magnelind
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States
| | - Fesseha G Mariam
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States
| | - Frank E Merrill
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States
| | - Levi P Neukirch
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States
| | - Tamsen Schurman
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States
| | - James Sinnis
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States
| | - Zhaowen Tang
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States
| | - Dale Tupa
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States
| | - Joshua L Tybo
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States
| | - Carl H Wilde
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States
| | - Michelle Espy
- Los Alamos National Laboratory, Los Alamos, New Mexico, United States
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Holtzman AL, Stahl JM, Zhu S, Morris CG, Hoppe BS, Kirwan JE, Mendenhall NP. Does the Incidence of Treatment-Related Toxicity Plateau After Radiation Therapy: The Long-Term Impact of Integral Dose in Hodgkin's Lymphoma Survivors. Adv Radiat Oncol 2019; 4:699-705. [PMID: 31673663 PMCID: PMC6817558 DOI: 10.1016/j.adro.2019.07.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 06/21/2019] [Accepted: 07/15/2019] [Indexed: 12/04/2022] Open
Abstract
Background Conventional radiation therapy (RT) has produced unprecedented cure rates in patients with Hodgkin's lymphoma (HL) but exposed large volumes of nontargeted tissue to radiation (integral dose). Objective Our goal was to report the effects of integral radiation dose on health outcomes in patients with at least 20 years of potential follow-up time. Methods and Materials We reviewed the medical records of 365 patients who were treated with RT for HL between 1965 and 1995. All patients were confirmed to have received primary RT with curative intent at our institution for de novo HL. Serious adverse events were classified as HL progression or death, grade ≥3 treatment- or staging-related acute or late effects, second malignancies, or cardiovascular events. Results The minimum potential follow-up time was 20 years, and the actual median follow-up time 22 years (range, <1-49 years) for all patients and 27 years (range, 5-49 years) for surviving patients. The overall survival rates at 5, 10, 20, 30, and 40 years were 86%, 76%, 64%, 44%, and 27%, respectively. The observed-to-expected ratio for second malignancy was 3.6 (95% confidence interval, 2.9-4.4). Grade ≥3 cardiovascular events occurred in 31% of all patients (n = 112). At the time of the most recent follow up, serious adverse events occurred in 70% of the entire cohort (n = 256) and 58% (n = 103), 77% (n = 103), and 93% (n = 50) among those with a potential 20, 30, and 40 years of follow up, respectively. Conclusions With increased survivorship, the long-term impact of the integral radiation dose may result in clinically significant adverse events, which suggests the importance of surveillance and affirms advances in both chemotherapy and RT that minimize the integral dose in future patients with HL.
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Affiliation(s)
- Adam L Holtzman
- Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, Florida
| | - John M Stahl
- Department of Radiation Oncology, University of Alabama-Birmingham School of Medicine, Birmingham, Alabama
| | - Simeng Zhu
- Department of Radiation Oncology, Wayne State University School of Medicine, Detroit, Michigan
| | - Christopher G Morris
- Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, Florida
| | - Bradford S Hoppe
- Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, Florida
| | - Jessica E Kirwan
- Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, Florida
| | - Nancy P Mendenhall
- Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, Florida
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Hoppe BS, Mendenhall NP, Louis D, Li Z, Flampouri S. Comparing Breath Hold and Free Breathing during Intensity-Modulated Radiation Therapy and Proton Therapy in Patients with Mediastinal Hodgkin Lymphoma. Int J Part Ther 2017; 3:492-496. [PMID: 31772999 DOI: 10.14338/ijpt-17-00012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 05/15/2017] [Indexed: 11/21/2022] Open
Affiliation(s)
- Bradford S Hoppe
- Department of Radiation Oncology, University of Florida College of Medicine, Jacksonville, FL, USA
| | - Nancy P Mendenhall
- Department of Radiation Oncology, University of Florida College of Medicine, Jacksonville, FL, USA
| | - Debbie Louis
- Department of Radiation Oncology, University of Florida College of Medicine, Jacksonville, FL, USA
| | - Zuofeng Li
- Department of Radiation Oncology, University of Florida College of Medicine, Jacksonville, FL, USA
| | - Stella Flampouri
- Department of Radiation Oncology, University of Florida College of Medicine, Jacksonville, FL, USA
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Yu AF, Jones LW. Modulation of cardiovascular toxicity in Hodgkin lymphoma: potential role and mechanisms of aerobic training. Future Cardiol 2015; 11:441-52. [PMID: 26234325 DOI: 10.2217/fca.15.29] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Hodgkin lymphoma (HL) outcomes have improved due to advances in cancer treatment. However, HL survivors remain at increased risk for cardiovascular (CV) morbidity and mortality related to the long-term cardiotoxicity of HL treatment, particularly anthracycline chemotherapy and mediastinal radiotherapy. The role of aerobic training for the prevention of CV disease in the general population has been well established. However the safety and efficacy of aerobic training on CV outcomes has not been well studied in HL survivors. The purpose of this paper is to provide an up-to-date summary of the treatment-related adverse CV effects in HL survivors, review the CV benefits of exercise and review the limited evidence on the potential CV benefit of aerobic training in HL survivors.
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Affiliation(s)
- Anthony F Yu
- Department of Medicine, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
| | - Lee W Jones
- Department of Medicine, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
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Abstract
Hodgkin lymphoma has gone from an incurable disease to one for which the majority of patients will be cured. Combined chemotherapy and radiotherapy achieves the best disease control rates and results in many long-term survivors. As a result, a majority of long-term Hodgkin lymphoma survivors live to experience severe late treatment-related complications, especially cardiovascular disease and second malignancies. The focus of research and treatment for Hodgkin lymphoma is to maintain the current high rates of disease control while reducing treatment-related morbidity and mortality. Efforts to reduce late treatment complications focus on improvements in both systemic therapies and radiotherapy. Herein we review the basis for the benefits of proton therapy over conventional X-ray therapy. We review outcomes of Hodgkin lymphoma treated with proton therapy, and discuss the ability of protons to reduce radiation dose to organs at risk and the impact on the most significant late complications related to the treatment.
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Plastaras JP, Berman AT, Freedman GM. Special Cases for Proton Beam Radiotherapy: Re-irradiation, Lymphoma, and Breast Cancer. Semin Oncol 2014; 41:807-19. [DOI: 10.1053/j.seminoncol.2014.10.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Colaco RJ, Nichols RC, Huh S, Getman N, Ho MW, Li Z, Morris CG, Mendenhall WM, Mendenhall NP, Hoppe BS. Protons offer reduced bone marrow, small bowel, and urinary bladder exposure for patients receiving neoadjuvant radiotherapy for resectable rectal cancer. J Gastrointest Oncol 2014; 5:3-8. [PMID: 24490037 DOI: 10.3978/j.issn.2078-6891.2013.041] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2012] [Accepted: 06/25/2013] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND To assess the potential benefit of proton therapy (PT) over photon therapy, we compared 3-dimensional conformal radiotherapy (3DCRT), intensity-modulated radiotherapy (IMRT), and PT plans in patients undergoing neoadjuvant chemoradiation for resectable rectal cancer at our institution. METHODS Eight consecutive patients with resectable (T2-T3) rectal cancers underwent 3DCRT, IMRT, and 3-dimensional conformal PT treatment planning. Initial target volumes (PTV1) were contoured using the Radiation Therapy Oncology Group anorectal atlas guidelines. Boost target volumes (PTV2) consisted of the gross rectal tumor plus a uniform 2-cm expansion. Plans delivered 45 Gray (Gy) or Cobalt Gray Equivalent (CGE) to the PTV1 and a 5.4-Gy (CGE) boost to the PTV2. Ninety-five percent of the PTVs received 100% of the target dose and 100% of the PTVs received 95% of the target dose. Standard normal-tissue constraints were utilized. Wilcoxon paired t-tests were performed to compare various dosimetric points between the 3 plans for each patient. RESULTS All plans met all normal-tissue constraints and were isoeffective in terms of PTV coverage. The proton plans offered significantly reduced median normal-tissue exposure over the 3DCRT and IMRT plans with respect to pelvic bone marrow at the V5Gy, V10Gy, V15Gy, and V20Gy levels and the small bowel space at the V10Gy and V20Gy levels. The proton plans also offered significantly reduced median normal-tissue exposure over the 3DCRT plans with respect to the small bowel at the V30Gy and V40Gy levels and the urinary bladder at the V40Gy level. CONCLUSIONS By reducing bone marrow exposure, PT may reduce the acute hematologic toxicity of neoadjuvant chemoradiation and increase the likelihood of uninterrupted chemotherapy delivery. Bone marrow sparing may also facilitate the delivery of salvage chemotherapy for patients who subsequently develop hematogenous metastasis. Reduced small bowel exposure using PT may also reduce toxicity and possibly facilitate the use of more-aggressive chemotherapy with radiotherapy.
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Affiliation(s)
- Rovel J Colaco
- University of Florida Proton Therapy Institute, Jacksonville, Florida, USA
| | | | - Soon Huh
- University of Florida Proton Therapy Institute, Jacksonville, Florida, USA
| | - Nataliya Getman
- University of Florida Proton Therapy Institute, Jacksonville, Florida, USA
| | - Meng Wei Ho
- University of Florida Proton Therapy Institute, Jacksonville, Florida, USA
| | - Zuofeng Li
- University of Florida Proton Therapy Institute, Jacksonville, Florida, USA
| | | | | | - Nancy P Mendenhall
- University of Florida Proton Therapy Institute, Jacksonville, Florida, USA
| | - Bradford S Hoppe
- University of Florida Proton Therapy Institute, Jacksonville, Florida, USA
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Improving the therapeutic ratio by using proton therapy in patients with stage I or II seminoma. Am J Clin Oncol 2013; 36:31-7. [PMID: 22134517 DOI: 10.1097/coc.0b013e3182354b9e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVES The goal of the present study was to evaluate possible dosimetric advantages of proton therapy (PT) compared with 3-dimensional conformal radiotherapy (3DCRT) or intensity-modulated radiotherapy (IMRT) in the treatment of patients with stage I and II seminoma. METHODS Two representative patients (1 with left-sided and 1 with right-sided seminoma) underwent treatment planning for stage I seminoma (paraaortic lymph nodes alone) with 3DCRT (PA3d), IMRT (PAimrt) double-scatter protons (PAPds), and uniform-scanning protons (PAPus) and for stage II seminoma (paraaortics lymph nodes and iliac nodes) with 3DCRT (PI3d) , IMRT (PIimrt) double-scatter protons (PIPds), and uniform-scanning protons (PIPus). The doses to the organs at risk were compared for photons and protons. RESULTS For stage I seminoma, PT reduced the mean dose to the stomach, ipsilateral kidney, pancreas, bowel space, small bowel, and colon compared with 3DCRT and IMRT. For stage II seminoma, PT reduced the mean dose to the same organs as in stage I seminoma with additional reductions in mean dose to the bladder and rectum compared with 3DCRT and IMRT. Uniform-scanning protons further reduced the dose to the organs at risk compared with double-scatter protons. CONCLUSIONS PT may offer an improvement in the therapeutic ratio in patients with seminoma by reducing the dose to normal tissue. This improvement may translate into lower risks of acute gastrointestinal side effects, infertility, and secondary malignancies, which should be explored in a prospective study.
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Benveniste MFK, Welsh J, Godoy MCB, Betancourt SL, Mawlawi OR, Munden RF. New era of radiotherapy: an update in radiation-induced lung disease. Clin Radiol 2013; 68:e275-90. [PMID: 23473474 DOI: 10.1016/j.crad.2013.01.013] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Revised: 12/13/2012] [Accepted: 01/11/2013] [Indexed: 12/25/2022]
Abstract
Over the last few decades, advances in radiotherapy (RT) technology have improved delivery of radiation therapy dramatically. Advances in treatment planning with the development of image-guided radiotherapy and in techniques such as proton therapy, allows the radiation therapist to direct high doses of radiation to the tumour. These advancements result in improved local regional control while reducing potentially damaging dosage to surrounding normal tissues. It is important for radiologists to be aware of the radiological findings from these advances in order to differentiate expected radiation-induced lung injury (RILD) from recurrence, infection, and other lung diseases. In order to understand these changes and correlate them with imaging, the radiologist should have access to the radiation therapy treatment plans.
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Affiliation(s)
- M F K Benveniste
- Department of Diagnostic Radiology, M. D. Anderson Cancer Center, Houston, TX 77030, USA.
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Terezakis SA, Kasamon YL. Tailored strategies for radiation therapy in classical Hodgkin's lymphoma. Crit Rev Oncol Hematol 2012; 84:71-84. [PMID: 22463873 PMCID: PMC4251770 DOI: 10.1016/j.critrevonc.2012.02.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2011] [Revised: 12/23/2011] [Accepted: 02/15/2012] [Indexed: 10/28/2022] Open
Abstract
Radiotherapeutic advances have contributed to the evolution of Hodgkin's lymphoma (HL) treatment paradigms. A reduction in radiation therapy (RT) field size and dose has the potential to significantly impact the therapeutic ratio by diminishing late toxicities while maintaining curability. Substantial progress in risk stratification has contributed to the development of tailored RT strategies which address both field design as well as dose. Technologic improvements have also enhanced the ability to adapt the RT technique to the individual patient. The refinement of the RT approach and its incorporation into current combined modality strategies in adult classical HL is the subject of ongoing investigation and is critically reviewed.
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Affiliation(s)
- Stephanie A Terezakis
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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Abstract
The increasing efficacy of pediatric cancer therapy over the past four decades has produced many long-term survivors that now struggle with serious treatment related morbidities affecting their quality of life. Radiation therapy is responsible for a significant proportion of these late effects, but a relatively new and emerging modality, proton radiotherapy hold great promise to drastically reduce these treatment related late effects in long term survivors by sparing dose to normal tissues. Dosimetric studies of proton radiotherapy compared with best available photon based treatment show significant dose sparing to developing normal tissues. Furthermore, clinical data are now emerging that begin to quantify the benefit in decreased late treatment effects while maintaining excellent cancer control rates.
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Affiliation(s)
- Shane E Cotter
- Department of Radiation Oncology, Brigham and Women's Hospital and Dana Farber Cancer Institute, Boston, MA 02115, USA
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Nichols RC, Huh SN, Henderson RH, Mendenhall NP, Flampouri S, Li Z, D'Agostino HJ, Cury JD, Pham DC, Hoppe BS. Proton radiation therapy offers reduced normal lung and bone marrow exposure for patients receiving dose-escalated radiation therapy for unresectable stage iii non-small-cell lung cancer: a dosimetric study. Clin Lung Cancer 2011; 12:252-7. [PMID: 21726825 DOI: 10.1016/j.cllc.2011.03.027] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Revised: 01/18/2011] [Accepted: 01/24/2011] [Indexed: 12/28/2022]
Abstract
INTRODUCTION The purpose of this study was to determine the potential benefit of proton radiation therapy over photon radiation therapy in patients with unresectable stage III non-small-cell lung cancer. MATERIALS AND METHODS Optimized 3-dimensional conformal photon (3DCRT), intensity-modulated radiation therapy (IMRT) and proton therapy (PT) plans were generated for 8 consecutive patients with unresectable stage III non-small-cell lung cancer using the same target goals and normal tissue constraints. The radiation exposure to non-targeted normal structures, including lung, bone marrow, esophagus, heart, and spinal cord, were compared. Photon doses are expressed in gray (Gy). Proton doses are expressed in cobalt gray equivalents (CGE). RESULTS In all patients, 3DCRT, IMRT, and PT plans, achieved the dose goals for the target volumes. Compared with the 3DCRT plans, proton plans offered a median 29% reduction in normal lung V(20) Gy (CGE), a median 33% reduction in mean lung dose (MLD), and a median 30% reduction in the volume of bone marrow receiving a dose of 10 Gy (CGE). Compared with the IMRT plans, the proton plans offered a median 26% reduction in normal lung V(20) Gy (CGE), a median 31% reduction in MLD, and a median 27% reduction in the volume of bone marrow receiving a dose of 10 Gy (CGE). CONCLUSION By reducing the volumes of normal structures irradiated, protons can potentially improve the therapeutic index for patients with unresectable stage III non-small-cell lung cancer receiving combined radiation therapy and chemotherapy.
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Affiliation(s)
- R Charles Nichols
- University of Florida Proton Therapy Institute, University of Florida College of Medicine, Jacksonville, USA.
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Hodgson DC, Dong L. Proton therapy for Hodgkin lymphoma: does a case report make the case? Leuk Lymphoma 2010; 51:1397-8. [DOI: 10.3109/10428194.2010.499978] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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