1
|
Foster-Thomas E, Aznar M, Brennan B, O’Malley L. Proton beam therapy and dentofacial development in paediatric cancer patients: A scoping review. Int J Part Ther 2024; 12:100107. [PMID: 38952615 PMCID: PMC11215291 DOI: 10.1016/j.ijpt.2024.100107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 05/24/2024] [Accepted: 05/29/2024] [Indexed: 07/03/2024] Open
Abstract
Purpose It is known that radiation to dentofacial structures during childhood can lead to developmental disturbances. However, this appears to be a relatively subordinated research subject. For this reason, this review aims to establish the current evidence base on the effect of PBT on dentofacial development in paediatric patients treated for cancer in the head and neck region. Materials and methods A comprehensive search was undertaken to identify both published and unpublished studies or reports. A single reviewer completed initial screening of abstracts; 2 independent reviewers completed secondary screening and data extraction. A narrative synthesis was then conducted. Results 82 records were screened in total, resulting in 11 included articles. These articles varied in terms of study design and reporting quality. Owing to both poor study reporting and limited patient numbers, it is not possible to determine the effect of cancer diagnosis, chronological age at treatment, radiation dose or treatment modality on the incidence of facial deformation or dental development anomalies. Conclusion Disturbances in dentofacial development are an under-reported toxicity in paediatric cancer survivors treated with PBT to the head and neck. There is a need for more research on dentofacial toxicity reporting, focused on the impact of treatment age, radiation dose, concurrent therapies, and the subsequent impact on quality of life.
Collapse
Affiliation(s)
- Emma Foster-Thomas
- NIHR Doctoral Fellow in Restorative Dentistry, Manchester University NHS Foundation Trust, UK
| | - Marianne Aznar
- Adaptive Radiotherapy, University of Manchester, Division of Clinical Cancer Science, School of Medical Sciences, UK
| | - Bernadette Brennan
- Consultant Paediatric Oncologist, Royal Manchester Children’s Hospital, UK
| | - Lucy O’Malley
- Health Services Research, School of Medical Sciences, The University of Manchester, UK
| |
Collapse
|
2
|
Furui Y, Araya M, Masaki H, Koiwai K, Sato R, Miyairi Y, Chiba A, Komori K, Kurata T, Sakashita K. Nasal cavity tumor successfully treated with urgent combined proton and photon therapy to preserve visual function: A case study. Pediatr Blood Cancer 2023; 70:e30570. [PMID: 37440325 DOI: 10.1002/pbc.30570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 07/04/2023] [Indexed: 07/15/2023]
Affiliation(s)
- Yu Furui
- Department of Hematology and Oncology, Nagano Children's Hospital, Azumino, Japan
| | - Masayuki Araya
- Department of Radiology, Center of Proton Therapy, Aizawa Hospital, Nagano, Japan
| | - Hidekazu Masaki
- Department of Radiology, Center of Proton Therapy, Aizawa Hospital, Nagano, Japan
| | - Keiichiro Koiwai
- Department of Radiology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Ririko Sato
- Department of Otorhinolaryngology, Nagano Children's Hospital, Azumino, Japan
| | - Yosuke Miyairi
- Department of Neurosurgery, Nagano Children's Hospital, Azumino, Japan
| | - Akihiro Chiba
- Department of Neurosurgery, Nagano Children's Hospital, Azumino, Japan
| | - Kazutoshi Komori
- Department of Hematology and Oncology, Nagano Children's Hospital, Azumino, Japan
| | - Takashi Kurata
- Department of Hematology and Oncology, Nagano Children's Hospital, Azumino, Japan
| | - Kazuo Sakashita
- Department of Hematology and Oncology, Nagano Children's Hospital, Azumino, Japan
| |
Collapse
|
3
|
Vennarini S, Colombo F, Mirandola A, Chiaravalli S, Orlandi E, Massimino M, Casanova M, Ferrari A. Clinical Insight on Proton Therapy for Paediatric Rhabdomyosarcoma. Cancer Manag Res 2023; 15:1125-1139. [PMID: 37842128 PMCID: PMC10576457 DOI: 10.2147/cmar.s362664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 10/05/2023] [Indexed: 10/17/2023] Open
Abstract
This paper offers an insight into the use of Proton Beam Therapy (PBT) in paediatric patients with rhabdomyosarcoma (RMS). This paper provides a comprehensive analysis of the literature, investigating comparative photon-proton dosimetry, outcome, and toxicity. In the complex and multimodal scenario of the treatment of RMS, clear evidence of the therapeutic superiority of PBT compared to other modern photon techniques has not yet been demonstrated; however, PBT can be considered an excellent treatment option, in particular for young children and patients with specific primary sites, such as the head and neck area (and especially the parameningeal regions), genito-urinary, pelvic, and paravertebral regions. The unique depth-dose characteristics of protons can be exploited to achieve significant reductions in normal tissue doses and may allow an escalation of tumour doses and greater sparing of normal tissues, thus potentially improving local control while at the same time reducing toxicity and improving quality of life. However, access of children with RMS (and more in general with solid tumors) to PBT remains a challenge, due to the limited number of available proton therapy installations.
Collapse
Affiliation(s)
- Sabina Vennarini
- Pediatric Radiotherapy Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - Francesca Colombo
- Pediatric Radiotherapy Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
- Department of Oncology and Hemato-Oncology (DIPO), University of Milan, Milan, Italy
| | - Alfredo Mirandola
- Medical Physics Unit, Clinical Department, National Center for Oncological Hadrontherapy (CNAO), Pavia, Italy
| | - Stefano Chiaravalli
- Pediatric Oncology Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milano, Italy
| | - Ester Orlandi
- Radiation Oncology Unit, Clinical Department, National Center for Oncological Hadrontherapy (CNAO), Pavia, Italy
| | - Maura Massimino
- Pediatric Oncology Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milano, Italy
| | - Michela Casanova
- Pediatric Oncology Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milano, Italy
| | - Andrea Ferrari
- Pediatric Oncology Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milano, Italy
| |
Collapse
|
4
|
Hol MLF, Indelicato DJ, Slater O, Kolb F, Hewitt RJ, Ong J, Becking AG, Gains J, Bradley J, Sandler E, Gaze MN, Pieters B, Mandeville H, Fajardo RD, Schoot R, Merks JHM, Hammond P, Smeele LE, Suttie M. Facial deformation following treatment for pediatric head and neck rhabdomyosarcoma; the difference between treatment modalities. Results of a trans-Atlantic, multicenter cross-sectional cohort study. Pediatr Blood Cancer 2023; 70:e30412. [PMID: 37249325 DOI: 10.1002/pbc.30412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 04/12/2023] [Accepted: 04/24/2023] [Indexed: 05/31/2023]
Abstract
BACKGROUND The four different local therapy strategies used for head and neck rhabdomyosarcoma (HNRMS) include proton therapy (PT), photon therapy (RT), surgery with radiotherapy (Paris-method), and surgery with brachytherapy (AMORE). Local control and survival is comparable; however, the impact of these different treatments on facial deformation is still poorly understood. This study aims to quantify facial deformation and investigates the differences in facial deformation between treatment modalities. METHODS Across four European and North American institutions, HNRMS survivors treated between 1990 and 2017, more than 2 years post treatment, had a 3D photograph taken. Using dense surface modeling, we computed facial signatures for each survivor to show facial deformation relative to 35 age-sex-ethnicity-matched controls. Additionally, we computed individual facial asymmetry. FINDINGS A total of 173 HNRMS survivors were included, survivors showed significantly reduced facial growth (p < .001) compared to healthy controls. Partitioned by tumor site, there was reduced facial growth in survivors with nonparameningeal primaries (p = .002), and parameningeal primaries (p ≤.001), but not for orbital primaries (p = .080) All patients were significantly more asymmetric than healthy controls, independent of treatment modality (p ≤ .001). There was significantly more facial deformation in orbital patients when comparing RT to AMORE (p = .046). In survivors with a parameningeal tumor, there was significantly less facial deformation in PT when compared to RT (p = .009) and Paris-method (p = .007). INTERPRETATION When selecting optimal treatment, musculoskeletal facial outcomes are an expected difference between treatment options. These anticipated differences are currently based on clinicians' bias, expertise, and experience. These data supplement clinician judgment with an objective analysis highlighting the impact of patient age and tumor site between existing treatment options.
Collapse
Affiliation(s)
- Marinka L F Hol
- Princess Maxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Department of Otorhinolaryngology, University of Utrecht, Utrecht, The Netherlands
- Department of Maxillofacial Surgery, Amsterdam UMC, Duivendrecht, The Netherlands
| | - Daniel J Indelicato
- Department of Radiation Oncology, University of Florida Proton Therapy Institute, Jacksonville, Florida, USA
| | - Olga Slater
- Department of Pediatric Oncology, Great Ormond Street Hospital, NHS Foundation Trust, London, UK
| | - Frederic Kolb
- Department of Plastic Surgery, Institute Gustave Roussy, Paris, France
| | - Richard J Hewitt
- Department of Head & Neck and Tracheal Surgery Great Ormond Street Hospital for Children, NHS Foundation Trust, London, UK
| | - Juling Ong
- Department of Craniofacial, Plastic and Reconstructive Surgery, Chelsea and Westminster NHS Hospital Foundation Trust, London, UK
| | - Alfred G Becking
- Department of Maxillofacial Surgery, Amsterdam UMC, Duivendrecht, The Netherlands
| | - Jenny Gains
- Department of Radiation Oncology, NHS Trust, London, UK
| | - Julie Bradley
- Department of Radiation Oncology, University of Florida Proton Therapy Institute, Jacksonville, Florida, USA
| | - Eric Sandler
- Division of Pediatric Oncology, Nemours Children's Specialty Clinic, Jacksonville, Florida, USA
| | - Mark N Gaze
- Department of Radiation Oncology, NHS Trust, London, UK
| | - Bradley Pieters
- Department or Radiation Oncology, Amsterdam UMC, Duivendrecht, The Netherlands
| | - Henry Mandeville
- Department of Radiotherapy, The Royal Marsden NHS Foundation Trust, and Institute of Cancer Research, Sutton, UK
| | | | - Reineke Schoot
- Princess Maxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | | | | | - Ludwig E Smeele
- Princess Maxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Department of Maxillofacial Surgery, Amsterdam UMC, Duivendrecht, The Netherlands
| | | |
Collapse
|
5
|
Uh J, Wang C, Jordan JA, Pirlepesov F, Becksfort JB, Ates O, Krasin MJ, Hua CH. A hybrid method of correcting CBCT for proton range estimation with deep learning and deformable image registration. Phys Med Biol 2023; 68:10.1088/1361-6560/ace754. [PMID: 37442128 PMCID: PMC10846632 DOI: 10.1088/1361-6560/ace754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 07/13/2023] [Indexed: 07/15/2023]
Abstract
Objective. This study aimed to develop a novel method for generating synthetic CT (sCT) from cone-beam CT (CBCT) of the abdomen/pelvis with bowel gas pockets to facilitate estimation of proton ranges.Approach. CBCT, the same-day repeat CT, and the planning CT (pCT) of 81 pediatric patients were used for training (n= 60), validation (n= 6), and testing (n= 15) of the method. The proposed method hybridizes unsupervised deep learning (CycleGAN) and deformable image registration (DIR) of the pCT to CBCT. The CycleGAN and DIR are respectively applied to generate the geometry-weighted (high spatial-frequency) and intensity-weighted (low spatial-frequency) components of the sCT, thereby each process deals with only the component weighted toward its strength. The resultant sCT is further improved in bowel gas regions and other tissues by iteratively feeding back the sCT to adjust incorrect DIR and by increasing the contribution of the deformed pCT in regions of accurate DIR.Main results. The hybrid sCT was more accurate than deformed pCT and CycleGAN-only sCT as indicated by the smaller mean absolute error in CT numbers (28.7 ± 7.1 HU versus 38.8 ± 19.9 HU/53.2 ± 5.5 HU;P≤ 0.012) and higher Dice similarity of the internal gas regions (0.722 ± 0.088 versus 0.180 ± 0.098/0.659 ± 0.129;P≤ 0.002). Accordingly, the hybrid method resulted in more accurate proton range for the beams intersecting gas pockets (11 fields in 6 patients) than the individual methods (the 90th percentile error in 80% distal fall-off, 1.8 ± 0.6 mm versus 6.5 ± 7.8 mm/3.7 ± 1.5 mm;P≤ 0.013). The gamma passing rates also showed a significant dosimetric advantage by the hybrid method (99.7 ± 0.8% versus 98.4 ± 3.1%/98.3 ± 1.8%;P≤ 0.007).Significance. The hybrid method significantly improved the accuracy of sCT and showed promises in CBCT-based proton range verification and adaptive replanning of abdominal/pelvic proton therapy even when gas pockets are present in the beam path.
Collapse
Affiliation(s)
- Jinsoo Uh
- Department of Radiation Oncology, St. Jude Children's Research Hospital, Memphis, TN, United States of America
| | - Chuang Wang
- Department of Radiation Oncology, St. Jude Children's Research Hospital, Memphis, TN, United States of America
| | - Jacob A Jordan
- Department of Radiation Oncology, St. Jude Children's Research Hospital, Memphis, TN, United States of America
- College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, United States of America
| | - Fakhriddin Pirlepesov
- Department of Radiation Oncology, St. Jude Children's Research Hospital, Memphis, TN, United States of America
| | - Jared B Becksfort
- Department of Radiation Oncology, St. Jude Children's Research Hospital, Memphis, TN, United States of America
| | - Ozgur Ates
- Department of Radiation Oncology, St. Jude Children's Research Hospital, Memphis, TN, United States of America
| | - Matthew J Krasin
- Department of Radiation Oncology, St. Jude Children's Research Hospital, Memphis, TN, United States of America
| | - Chia-Ho Hua
- Department of Radiation Oncology, St. Jude Children's Research Hospital, Memphis, TN, United States of America
| |
Collapse
|
6
|
Roohani S, Loskutov J, Heufelder J, Ehret F, Wedeken L, Regenbrecht M, Sauer R, Zips D, Denker A, Joussen AM, Regenbrecht CRA, Kaul D. Photon and Proton irradiation in Patient-derived, Three-Dimensional Soft Tissue Sarcoma Models. BMC Cancer 2023; 23:577. [PMID: 37349697 DOI: 10.1186/s12885-023-11013-y] [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: 11/07/2022] [Accepted: 05/25/2023] [Indexed: 06/24/2023] Open
Abstract
BACKGROUND Despite their heterogeneity, the current standard preoperative radiotherapy regimen for localized high-grade soft tissue sarcoma (STS) follows a one fits all approach for all STS subtypes. Sarcoma patient-derived three-dimensional cell culture models represent an innovative tool to overcome challenges in clinical research enabling reproducible subtype-specific research on STS. In this pilot study, we present our methodology and preliminary results using STS patient-derived 3D cell cultures that were exposed to different doses of photon and proton radiation. Our aim was: (i) to establish a reproducible method for irradiation of STS patient-derived 3D cell cultures and (ii) to explore the differences in tumor cell viability of two different STS subtypes exposed to increasing doses of photon and proton radiation at different time points. METHODS Two patient-derived cell cultures of untreated localized high-grade STS (an undifferentiated pleomorphic sarcoma (UPS) and a pleomorphic liposarcoma (PLS)) were exposed to a single fraction of photon or proton irradiation using doses of 0 Gy (sham irradiation), 2 Gy, 4 Gy, 8 Gy and 16 Gy. Cell viability was measured and compared to sham irradiation at two different time points (four and eight days after irradiation). RESULTS The proportion of viable tumor cells four days after photon irradiation for UPS vs. PLS were significantly different with 85% vs. 65% (4 Gy), 80% vs. 50% (8 Gy) and 70% vs. 35% (16 Gy). Proton irradiation led to similar diverging viability curves between UPS vs. PLS four days after irradiation with 90% vs. 75% (4 Gy), 85% vs. 45% (8 Gy) and 80% vs. 35% (16 Gy). Photon and proton radiation displayed only minor differences in cell-killing properties within each cell culture (UPS and PLS). The cell-killing effect of radiation sustained at eight days after irradiation in both cell cultures. CONCLUSIONS Pronounced differences in radiosensitivity are evident among UPS and PLS 3D patient-derived sarcoma cell cultures which may reflect the clinical heterogeneity. Photon and proton radiation showed similar dose-dependent cell-killing effectiveness in both 3D cell cultures. Patient-derived 3D STS cell cultures may represent a valuable tool to enable translational studies towards individualized subtype-specific radiotherapy in patients with STS.
Collapse
Affiliation(s)
- Siyer Roohani
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Radiation Oncology, Augustenburger Platz 1, 13353, Berlin, Germany.
- Charité - Universitätsmedizin Berlin, German Cancer Consortium (DKTK), partner site Berlin, and German Cancer Research Center (DKFZ), 69120, Berlin, Heidelberg, Germany.
| | - Jürgen Loskutov
- CELLphenomics GmbH, Robert-Rössle-Str. 10, 13125, Berlin, Germany
| | - Jens Heufelder
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, BerlinProtonen am Helmholtz-Zentrum Berlin, 14109, Berlin, Germany
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Ophthalmology, 12200, Berlin, Germany
| | - Felix Ehret
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Radiation Oncology, Augustenburger Platz 1, 13353, Berlin, Germany
- Charité - Universitätsmedizin Berlin, German Cancer Consortium (DKTK), partner site Berlin, and German Cancer Research Center (DKFZ), 69120, Berlin, Heidelberg, Germany
- Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - Lena Wedeken
- CELLphenomics GmbH, Robert-Rössle-Str. 10, 13125, Berlin, Germany
| | - Manuela Regenbrecht
- CELLphenomics GmbH, Robert-Rössle-Str. 10, 13125, Berlin, Germany
- Helios Klinikum Berlin-Buch, Schwanebecker Chaussee 50, 13125, Berlin, Germany
- ASC Oncology GmbH, Robert-Rössle-Str. 10, 13125, Berlin, Germany
| | - Rica Sauer
- Institute of Pathology, Helios Klinikum Emil von Behring, Walterhöferstr. 11, 14165, Berlin, Germany
| | - Daniel Zips
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Radiation Oncology, Augustenburger Platz 1, 13353, Berlin, Germany
- Charité - Universitätsmedizin Berlin, German Cancer Consortium (DKTK), partner site Berlin, and German Cancer Research Center (DKFZ), 69120, Berlin, Heidelberg, Germany
| | - Andrea Denker
- Helmholtz-Zentrum Berlin für Materialien und Energie, 14109, Berlin, Germany
| | - Antonia M Joussen
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Ophthalmology, 12200, Berlin, Germany
| | - Christian R A Regenbrecht
- CELLphenomics GmbH, Robert-Rössle-Str. 10, 13125, Berlin, Germany
- ASC Oncology GmbH, Robert-Rössle-Str. 10, 13125, Berlin, Germany
- Institut für Pathologie, Universitätsmedizin Göttingen, Robert-Koch-Straße 40, 37075, Göttingen, Germany
| | - David Kaul
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Radiation Oncology, Augustenburger Platz 1, 13353, Berlin, Germany
- Charité - Universitätsmedizin Berlin, German Cancer Consortium (DKTK), partner site Berlin, and German Cancer Research Center (DKFZ), 69120, Berlin, Heidelberg, Germany
| |
Collapse
|
7
|
Developments in the Surgical Approach to Staging and Resection of Rhabdomyosarcoma. Cancers (Basel) 2023; 15:cancers15020449. [PMID: 36672397 PMCID: PMC9857078 DOI: 10.3390/cancers15020449] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 01/03/2023] [Accepted: 01/06/2023] [Indexed: 01/13/2023] Open
Abstract
Although survival after rhabdosarcoma treatment has improved over the years, one third of patients still develop locoregional relapse. This review aims to highlight developments pertaining to staging and local treatment of specific RMS tumor sites, including head and neck, chest/trunk, bladder-prostate, female genito-urinary, perianal, and extremity sites.
Collapse
|
8
|
Maradia V, Colizzi I, Meer D, Weber DC, Lomax AJ, Actis O, Psoroulas S. Universal and dynamic ridge filter for pencil beam scanning particle therapy: a novel concept for ultra-fast treatment delivery. Phys Med Biol 2022; 67. [DOI: 10.1088/1361-6560/ac9d1f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Accepted: 10/24/2022] [Indexed: 11/07/2022]
Abstract
Abstract
Objective. In pencil beam scanning particle therapy, a short treatment delivery time is paramount for the efficient treatment of moving targets with motion mitigation techniques (such as breath-hold, rescanning, and gating). Energy and spot position change time are limiting factors in reducing treatment time. In this study, we designed a universal and dynamic energy modulator (ridge filter, RF) to broaden the Bragg peak, to reduce the number of energies and spots required to cover the target volume, thus lowering the treatment time. Approach. Our RF unit comprises two identical RFs placed just before the isocenter. Both RFs move relative to each other, changing the Bragg peak’s characteristics dynamically. We simulated different Bragg peak shapes with the RF in Monte Carlo simulation code (TOPAS) and validated them experimentally. We then delivered single-field plans with 1 Gy/fraction to different geometrical targets in water, to measure the dose delivery time using the RF and compare it with the clinical settings. Main results. Aligning the RFs in different positions produces different broadening in the Bragg peak; we achieved a maximum broadening of 2.5 cm. With RF we reduced the number of energies in a field by more than 60%, and the dose delivery time by 50%, for all geometrical targets investigated, without compromising the dose distribution transverse and distal fall-off. Significance. Our novel universal and dynamic RF allows for the adaptation of the Bragg peak broadening for a spot and/or energy layer based on the requirement of dose shaping in the target volume. It significantly reduces the number of energy layers and spots to cover the target volume, and thus the treatment time. This RF design is ideal for ultra-fast treatment delivery within a single breath-hold (5–10 s), efficient delivery of motion mitigation techniques, and small animal irradiation with ultra-high dose rates (FLASH).
Collapse
|
9
|
Yi B, Mossahebi S, Modiri A, Nichols EM, Guerrero M, Lamichhane N, Mohindra P. Proton Arc Therapy vs Interstitial HDR Brachytherapy in Gynecologic Cancer with Parametrial/pelvic Side Wall Extension. Int J Part Ther 2022; 9:31-39. [PMID: 36060416 PMCID: PMC9415748 DOI: 10.14338/ijpt-22-00013.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 05/10/2022] [Indexed: 11/22/2022] Open
Abstract
Purpose To investigate whether volumetric-modulated proton arc therapy (VPAT) plans generate comparable doses to organs at risk (OARs) compared with interstitial high–dose-rate (iHDR) brachytherapy for patients with gynecologic cancer with disease extension to parametrial/pelvic side wall, who are not eligible for the aggressive procedure. Materials and Methods VPAT delivers proton arc beams by modulated energies at the beam nozzle while maintaining the same incident energy to the gantry during the arc rotation. Plans of 10 patients previously treated with iHDR brachytherapy for high-risk clinical treatment volumes (HRCTV; 31.8–110.6 cm3; lateral dimensions, 4.2–5.6 cm) were selected and compared with VPAT plans. VPAT plans for each patient were designed using a 152- to 245-MeV range of energy-modulated proton beams. Results HRCTV coverage of the VPAT plans was comparable to that of the iHDR plans, with V150% showing no statistical differences. On average, the V100% and V90% of VPAT plans were higher than those of the iHDR plans, 95.0% vs 91.9% (P = .02) and 98.6% vs 97.5% (P = .02), respectively. D100 was also 17% higher for the VPAT plans (P = .03). On average, the D2cm3 of bladder, rectum, and small bowels in the VPAT plans were considerably lower than those in iHDR plans (by 17.4%, 35.2%, and 65.6%, respectively; P < .05 for all OARs). Conclusion VPAT–generated plans were dosimetrically superior to those with HDR brachytherapy with interstitial needles for locally advanced gynecologic cancer with parametrial/pelvic side wall disease extension. Dosimetrically, VPAT provides a noninvasive alternative to iHDR brachytherapy with a superior dosimetric profile.
Collapse
Affiliation(s)
- ByongYong Yi
- 1 Department of Radiation Oncology, University of Maryland School of Medicine, MD, USA
- 2 Proton Treatment Center, Baltimore, MD, USA
| | - Sina Mossahebi
- 1 Department of Radiation Oncology, University of Maryland School of Medicine, MD, USA
- 2 Proton Treatment Center, Baltimore, MD, USA
| | - Arezoo Modiri
- 1 Department of Radiation Oncology, University of Maryland School of Medicine, MD, USA
| | - Elizabeth M. Nichols
- 1 Department of Radiation Oncology, University of Maryland School of Medicine, MD, USA
- 2 Proton Treatment Center, Baltimore, MD, USA
| | - Mariana Guerrero
- 1 Department of Radiation Oncology, University of Maryland School of Medicine, MD, USA
| | - Narottam Lamichhane
- 1 Department of Radiation Oncology, University of Maryland School of Medicine, MD, USA
| | - Pranshu Mohindra
- 1 Department of Radiation Oncology, University of Maryland School of Medicine, MD, USA
- 2 Proton Treatment Center, Baltimore, MD, USA
| |
Collapse
|
10
|
The Current State of Radiotherapy for Pediatric Brain Tumors: An Overview of Post-Radiotherapy Neurocognitive Decline and Outcomes. J Pers Med 2022; 12:jpm12071050. [PMID: 35887547 PMCID: PMC9315742 DOI: 10.3390/jpm12071050] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 06/10/2022] [Accepted: 06/13/2022] [Indexed: 11/17/2022] Open
Abstract
Tumors of the central nervous system are the most common solid malignancies diagnosed in children. While common, they are also found to have some of the lowest survival rates of all malignancies. Treatment of childhood brain tumors often consists of operative gross total resection with adjuvant chemotherapy or radiotherapy. The current body of literature is largely inconclusive regarding the overall benefit of adjuvant chemo- or radiotherapy. However, it is known that both are associated with conditions that lower the quality of life in children who undergo those treatments. Chemotherapy is often associated with nausea, emesis, significant fatigue, immunosuppression, and alopecia. While radiotherapy can be effective for achieving local control, it is associated with late effects such as endocrine dysfunction, secondary malignancy, and neurocognitive decline. Advancements in radiotherapy grant both an increase in lifetime survival and an increased lifetime for survivors to contend with these late effects. In this review, the authors examined all the published literature, analyzing the results of clinical trials, case series, and technical notes on patients undergoing radiotherapy for the treatment of tumors of the central nervous system with a focus on neurocognitive decline and survival outcomes.
Collapse
|
11
|
A dosimetric comparison of proton versus photon irradiation for paediatric glomus tumour: a case study. JOURNAL OF RADIOTHERAPY IN PRACTICE 2022. [DOI: 10.1017/s1460396922000140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Abstract
Background:
Intensity-modulated radiation therapy (IMRT) has revolutionised the way head and neck cancers can be treated. It allows for a more conformal treatment plan when compared to 3D conformal radiation therapy. In paediatric patients, however, IMRT continues to deliver higher doses than desirable. Proton beam therapy on the other hand has the potential to further spare organs-at-risk.
Methods:
A 16-year-old boy with a left-sided paraganglioma of the left base of skull manifested by headaches, neck pain and tongue cramping was simulated, planned and treated with proton therapy with significant contralateral organ-at-risk sparing.
Results:
For this patient, dosimetric plan comparison between photon and proton plans clearly showed better sparing of contralateral organs-at-risk with protons. The contralateral parotid gland received a mean dose of 386·3 cGy with photons, whereas it received 1·3 cGy (CGE) in the proton plan.
Conclusions:
The dosimetric advantage of proton beam over photon beam therapy has successfully been demonstrated in this case study for a paediatric patient with a head and neck tumour. Sparing of contralateral structures is especially important in paediatric patients who are at a greater risk of secondary malignancies due to possible long life expectancy.
Collapse
|
12
|
Kawai A, Araki N, Ae K, Akiyama T, Ozaki T, Kawano H, Kunisada T, Sumi M, Takahashi S, Tanaka K, Tsukushi S, Naka N, Nishida Y, Miyachi M, Yamamoto N, Yoshida A, Yonemoto T, Yoshida M, Iwata S. Japanese Orthopaedic Association (JOA) clinical practice guidelines on the management of soft tissue tumors 2020 - Secondary publication. J Orthop Sci 2022; 27:533-550. [PMID: 35339316 DOI: 10.1016/j.jos.2021.11.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/05/2021] [Accepted: 11/08/2021] [Indexed: 11/19/2022]
Abstract
BACKGROUND These clinical practice guidelines are intended to provide recommendations based on the best evidence obtained to date on key issues in clinical practice to improve the prognosis, diagnostic and therapeutic processes for patients with soft tissue tumors. METHODS The Guidelines Development Committee and Systematic Review Committee were composed of a multidisciplinary team of specialists who play an important role in soft tissue tumor care. Clinical questions (CQs) were determined by choosing key decision-making points based on Algorithms for the diagnosis and treatment of soft tissue tumors. The guidelines were developed according to the "Medical Information Network Distribution Service (Minds) Handbook for Clinical Practice Guideline Development 2014" and "Minds Manual for Clinical Practice Guideline Development 2017." Recommendation strength was rated on two levels and the strength of evidence was rated on four levels. The recommendations were decided based on agreement by 70% or more voters. RESULTS Twenty-two CQs were chosen by the Guidelines Development Committee. The Systematic Review Committee reviewed the evidence concerning each CQ, a clinical value judgment was added by experts, and the text of each recommendation was determined. CONCLUSION We established 22 CQs and recommendations for key decision-making points in the diagnosis and treatment of soft tissue tumors according to the Minds Clinical Practice Guideline development methods. We hope that these guidelines will assist the decision-making of all medical staff engaged in the treatment and diagnosis of soft tissue tumors, and eventually lead to improved soft tissue tumor care in the country.
Collapse
Affiliation(s)
- Akira Kawai
- Department of Musculoskeletal Oncology and Rehabilitation Medicine, National Cancer Center Hospital, Tokyo, Japan.
| | - Nobuhito Araki
- Department of Orthopaedic Surgery, Ashiya Municipal Hospital, Hyogo, Japan
| | - Keisuke Ae
- Department of Musculoskeletal Oncology, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Japan
| | - Toru Akiyama
- Department of Orthopaedic Surgery, Saitama Medical Center, Jichi Medical University, Japan
| | - Toshifumi Ozaki
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Japan
| | - Hirotaka Kawano
- Department of Orthopaedic Surgery, Teikyo University School of Medicine, Japan
| | - Toshiyuki Kunisada
- Department of Medical Materials for Musculoskeletal Reconstruction, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Japan
| | - Minako Sumi
- Radiation Oncology Department, Tokyo Metropolitan Geriatric Hospital, Japan
| | - Shunji Takahashi
- Department of Medical Oncology, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Japan
| | - Kazuhiro Tanaka
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Japan
| | | | - Norifumi Naka
- Department of Orthopedic Surgery, NachiKatsuura Town Onsen Hospital, Japan
| | - Yoshihiro Nishida
- Department of Rehabilitation Medicine, Nagoya University Hospital, Japan
| | - Mitsuru Miyachi
- Department of Pediatrics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Japan
| | - Norio Yamamoto
- Department of Orthopaedic Surgery, Kanazawa University Graduate School of Medical Sciences, Japan
| | - Akihiko Yoshida
- Department of Diagnostic Pathology, National Cancer Center Hospital, Tokyo, Japan
| | | | - Masahiro Yoshida
- International University of Health and Welfare, Japan Council for Quality Health Care, Japan
| | - Shintaro Iwata
- Department of Musculoskeletal Oncology and Rehabilitation Medicine, National Cancer Center Hospital, Tokyo, Japan
| |
Collapse
|
13
|
Pediatric radiotherapy for thoracic and abdominal targets: organ motion, reported margin sizes, and delineation variations – a systematic review. Radiother Oncol 2022; 173:134-145. [DOI: 10.1016/j.radonc.2022.05.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 05/09/2022] [Accepted: 05/26/2022] [Indexed: 11/21/2022]
|
14
|
Sheikh K, Liu D, Li H, Acharya S, Ladra MM, Hrinivich WT. Dosimetric evaluation of cone-beam CT-based synthetic CTs in pediatric patients undergoing intensity-modulated proton therapy. J Appl Clin Med Phys 2022; 23:e13604. [PMID: 35413144 PMCID: PMC9194971 DOI: 10.1002/acm2.13604] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 03/10/2022] [Accepted: 03/21/2022] [Indexed: 11/07/2022] Open
Abstract
PURPOSE To evaluate dosimetric changes detected using synthetic computed tomography (sCT) derived from online cone-beam CTs (CBCT) in pediatric patients treated using intensity-modulated proton therapy (IMPT). METHODS Ten pediatric patients undergoing IMPT and aligned daily using proton gantry-mounted CBCT were identified for retrospective analysis with treated anatomical sites fully encompassed in the CBCT field of view. Dates were identified when the patient received both a CBCT and a quality assurance CT (qCT) for routine dosimetric evaluation. sCTs were generated based on a deformable registration between the initial plan CT (pCT) and CBCT. The clinical IMPT plans were re-computed on the same day qCT and sCT, and dosimetric changes due to tissue change or response from the initial plan were computed using each image. Linear regression analysis was performed to determine the correlation between dosimetric changes detected using the qCT and the sCT. Gamma analysis was also used to compare the dose distributions computed on the qCT and sCT. RESULTS The correlation coefficients (p-values) between qCTs and sCTs for changes detected in target coverage, overall maximum dose, and organ at risk dose were 0.97 (< .001), 0.84 (.002) and 0.91 (< .001), respectively. Mean ± SD gamma pass rates of the sCT-based dose compared to the qCT-based dose at 3%/3 mm, 3%/2 mm, and 2%/2 mm criteria were 96.5%±4.5%, 93.2%±6.3%, and 91.3%±7.8%, respectively. Pass rates tended to be lower for targets near lung. CONCLUSION While insufficient for re-planning, sCTs provide approximate dosimetry without administering additional imaging dose in pediatric patients undergoing IMPT. Dosimetric changes detected using sCTs are correlated with changes detected using clinically-standard qCTs; however, residual differences in dosimetry remain a limitation. Further improvements in sCT image quality may both improve online dosimetric evaluation and reduce imaging dose for pediatric patients by reducing the need for routine qCTs.
Collapse
Affiliation(s)
- Khadija Sheikh
- Department of Radiation Oncology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Dezhi Liu
- Department of Radiation Oncology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Heng Li
- Department of Radiation Oncology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Sahaja Acharya
- Department of Radiation Oncology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Matthew M Ladra
- Department of Radiation Oncology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - William T Hrinivich
- Department of Radiation Oncology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| |
Collapse
|
15
|
Istl AC, Gronchi A. Neoadjuvant Therapy for Primary Resectable Retroperitoneal Sarcomas-Looking Forward. Cancers (Basel) 2022; 14:1831. [PMID: 35406603 PMCID: PMC8998126 DOI: 10.3390/cancers14071831] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 03/23/2022] [Accepted: 03/26/2022] [Indexed: 01/25/2023] Open
Abstract
The cornerstone of therapy for primary retroperitoneal sarcomas (RPS) is complete surgical resection, best achieved by resecting the tumor en bloc with adherent structures even if not overtly infiltrated. Until recently, trials designed to elucidate the role of neoadjuvant radiation or chemotherapy for RPS have been unable to achieve sufficient enrollment. The completion of the STRASS trial, which explored neoadjuvant radiotherapy for primary resectable RPS, is a major milestone in RPS research, but has prompted further questions about histology-driven treatment paradigms for RPS. Though it was ultimately a negative trial with respect to its primary endpoint of abdominal recurrence-free survival, STRASS produced a signal that suggested improved abdominal recurrence-free survival with neoadjuvant radiotherapy (RT) for patients with liposarcoma (LPS). No effect was seen for leiomyosarcoma (LMS) or high-grade dedifferentiated (DD) LPS, consistent with recent literature suggesting LMS and high-grade DD-LPS have a predominant pattern of distant rather than local failure. These results, along with those from other recent studies conducted at the bench and the bedside, emphasize the importance of a histology-specific approach to RPS research. Recent evidence for patterns of distant failure in LMS and high-grade DD-LPS has prompted the initiation of STRASS2, a study of neoadjuvant chemotherapy for these histologies. As this study unfolds, evidence may emerge for novel systemic therapy options in specific sarcoma histotypes given the explosion in targeted and immunotherapeutic applications over the last decade. This article reviews current and recent evidence around neoadjuvant radiation and chemotherapy as well as avenues for future study to optimize these treatment approaches.
Collapse
Affiliation(s)
- Alexandra C. Istl
- Division of Surgical Oncology, Johns Hopkins Hospital, Baltimore, MD 21287, USA;
| | - Alessandro Gronchi
- Department of Surgery, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Venezian 1, 20133 Milan, Italy
| |
Collapse
|
16
|
Nogueira LM, Sineshaw HM, Jemal A, Pollack CE, Efstathiou JA, Yabroff KR. Association of Race With Receipt of Proton Beam Therapy for Patients With Newly Diagnosed Cancer in the US, 2004-2018. JAMA Netw Open 2022; 5:e228970. [PMID: 35471569 PMCID: PMC9044116 DOI: 10.1001/jamanetworkopen.2022.8970] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
IMPORTANCE Black patients are less likely than White patients to receive guideline-concordant cancer care in the US. Proton beam therapy (PBT) is a potentially superior technology to photon radiotherapy for tumors with complex anatomy, tumors surrounded by sensitive tissues, and childhood cancers. OBJECTIVE To evaluate whether there are racial disparities in the receipt of PBT among Black and White individuals diagnosed with all PBT-eligible cancers in the US. DESIGN, SETTING, AND PARTICIPANTS This cross-sectional study evaluated Black and White individuals diagnosed with PBT-eligible cancers between January 1, 2004, and December 31, 2018, in the National Cancer Database, a nationwide hospital-based cancer registry that collects data on radiation treatment, even when it is received outside the reporting facility. American Society of Radiation Oncology model policies were used to classify patients into those for whom PBT is the recommended radiation therapy modality (group 1) and those for whom evidence of PBT efficacy is still under investigation (group 2). Propensity score matching was used to ensure comparability of Black and White patients' clinical characteristics and regional availability of PBT according to the National Academy of Medicine's definition of disparities. Data analysis was performed from October 4, 2021, to February 22, 2022. EXPOSURE Patients' self-identified race was ascertained from medical records. MAIN OUTCOMES AND MEASURES The main outcome was receipt of PBT, with disparities in this therapy's use evaluated with logistic regression analysis. RESULTS Of the 5 225 929 patients who were eligible to receive PBT and included in the study, 13.6% were Black, 86.4% were White, and 54.3% were female. The mean (SD) age at diagnosis was 63.2 (12.4) years. Black patients were less likely to be treated with PBT than their White counterparts (0.3% vs 0.5%; odds ratio [OR], 0.67; 95% CI, 0.64-0.71). Racial disparities were greater for group 1 cancers (0.4% vs 0.8%; OR, 0.49; 95% CI, 0.44-0.55) than group 2 cancers (0.3% vs 0.4%; OR, 0.75; 95% CI, 0.70-0.80). Racial disparities in PBT receipt among group 1 cancers increased over time (annual percent change = 0.09, P < .001) and were greatest in 2018, the most recent year of available data. CONCLUSIONS AND RELEVANCE In this cross-sectional study, Black patients were less likely to receive PBT than their White counterparts, and disparities were greatest for cancers for which PBT was the recommended radiation therapy modality. These findings suggest that efforts other than increasing the number of facilities that provide PBT will be needed to eliminate disparities.
Collapse
Affiliation(s)
- Leticia M. Nogueira
- Department of Surveillance and Health Equity Science, American Cancer Society, Atlanta, Georgia
| | - Helmneh M. Sineshaw
- Department of Surveillance and Health Equity Science, American Cancer Society, Atlanta, Georgia
| | - Ahmedin Jemal
- Department of Surveillance and Health Equity Science, American Cancer Society, Atlanta, Georgia
| | - Craig E. Pollack
- Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health and Johns Hopkins School of Nursing, Baltimore, Maryland
| | | | - K. Robin Yabroff
- Department of Surveillance and Health Equity Science, American Cancer Society, Atlanta, Georgia
| |
Collapse
|
17
|
Di Carlo D, Chargari C, Scoazec JY, Cotteret S, Felix A, Moalla S, Temam S, Minard-Colin V. PAX3-NCOA1 alveolar rhabdomyosarcoma of the tongue: A rare entity with challenging diagnosis and management. Pediatr Blood Cancer 2021; 68:e29288. [PMID: 34424607 DOI: 10.1002/pbc.29288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 07/08/2021] [Accepted: 08/02/2021] [Indexed: 12/23/2022]
Abstract
Alveolar rhabdomyosarcoma (ARMS) is associated with PAX3/PAX7-FOXO1 fusion, which confers specific clinic and biologic characteristics with inferior outcomes. A minority of tumors still histologically classified as "true" ARMS lack the canonical PAX-FOXO1 fusion but have new molecular alterations. We present the first case of PAX3-NCOA1 ARMS with clinical data and follow-up in a two-year-old girl with ARMS of the tongue and nodal extension, treated with chemotherapy, hemi glossectomy, lymph node dissection, and brachytherapy to conserve oral function and limit long-term sequelae. Given the rarity of such variant fusion in ARMS, international collaboration is required to evaluate its prognostic value.
Collapse
Affiliation(s)
- Daniela Di Carlo
- Hematology Oncology Division, Department of Women's and Children's Health, University of Padova, Padova, Italy
| | - Cyrus Chargari
- Department of Radiation Oncology, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - Jean-Yves Scoazec
- Department of Pathology and Translational Research, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - Sophie Cotteret
- Departement of Biologie and Pathology, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - Arthur Felix
- Department of Pediatric and Adolescent Oncology, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - Salma Moalla
- Interventional Radiology Unit, Medical Imaging Department, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - Stephane Temam
- Department of Head and Neck Surgery, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - Véronique Minard-Colin
- Department of Pediatric and Adolescent Oncology, Gustave Roussy, Université Paris-Saclay, Villejuif, France.,INSERM U1015, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| |
Collapse
|
18
|
Maradia V, Meer D, Weber DC, Lomax AJ, Schippers JM, Psoroulas S. A new emittance selection system to maximize beam transmission for low-energy beams in cyclotron-based proton therapy facilities with gantry. Med Phys 2021; 48:7613-7622. [PMID: 34655083 PMCID: PMC9298197 DOI: 10.1002/mp.15278] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 08/24/2021] [Accepted: 10/03/2021] [Indexed: 02/06/2023] Open
Abstract
Purpose In proton therapy, the potential of using high‐dose rates in the cancer treatment is being explored. High‐dose rates could improve efficiency and throughput in standard clinical practice, allow efficient utilization of motion mitigation techniques for moving targets, and potentially enhance normal tissue sparing due to the so‐called FLASH effect. However, high‐dose rates are difficult to reach when lower energy beams are applied in cyclotron‐based proton therapy facilities, because they result in large beam sizes and divergences downstream of the degrader, incurring large losses from the cyclotron to the patient position (isocenter). In current facilities, the emittance after the degrader is reduced using circular collimators; however, this does not provide an optimal matching to the acceptance of the following beamline, causing a low transmission for these energies. We, therefore, propose to use a collimation system, asymmetric in both beam size and divergence, resulting in symmetric emittance in both beam transverse planes as required for a gantry system. This new emittance selection, together with a new optics design for the following beamline and gantry, allows a better matching to the beamline acceptance and an improvement of the transmission. Methods We implemented a custom method to design the collimator sizes and shape required to select high emittance, to be transported by the following beamline using new beam optics (designed with TRANSPORT) to maximize acceptance matching. For predicting the transmission in the new configuration (new collimators + optics), we used Monte Carlo simulations implemented in BDSIM, implementing a model of PSI Gantry 2 which we benchmarked against measurements taken in the current clinical scenario (circular collimators + clinical optics). Results From the BDSIM simulations, we found that the new collimator system and matching beam optics results in an overall transmission from the cyclotron to the isocenter for a 70 MeV beam of 0.72%. This is an improvement of almost a factor of 6 over the current clinical performance (0.13% transmission). The new optics satisfies clinical beam requirements at the isocenter. Conclusions We developed a new emittance collimation system for PSI's PROSCAN beamline which, by carefully selecting beam size and divergence asymmetrically, increases the beam transmission for low‐energy beams in current state‐of‐the‐art cyclotron‐based proton therapy gantries. With these improvements, we could predict almost 1% transmission for low‐energy beams at PSI's Gantry 2. Such a system could easily be implemented in facilities interested in increasing dose rates for efficient motion mitigation and FLASH experiments alike.
Collapse
Affiliation(s)
- Vivek Maradia
- Center for Proton Therapy, Paul Scherrer Institute, Villigen, Switzerland.,Department of Physics, ETH Zurich, Zurich, Switzerland
| | - David Meer
- Center for Proton Therapy, Paul Scherrer Institute, Villigen, Switzerland
| | - Damien Charles Weber
- Center for Proton Therapy, Paul Scherrer Institute, Villigen, Switzerland.,Department of Radiation Oncology, University Hospital Zurich, Zurich, Switzerland.,Department of Radiation Oncology, University Hospital Bern, University of Bern, Bern, Switzerland
| | - Antony John Lomax
- Center for Proton Therapy, Paul Scherrer Institute, Villigen, Switzerland.,Department of Physics, ETH Zurich, Zurich, Switzerland
| | | | - Serena Psoroulas
- Center for Proton Therapy, Paul Scherrer Institute, Villigen, Switzerland
| |
Collapse
|
19
|
J F, A S, V E, F P, P M, B T, Sw W. New aspects and innovations in the local treatment of renal and urogenital pediatric tumors. Semin Pediatr Surg 2021; 30:151081. [PMID: 34412882 DOI: 10.1016/j.sempedsurg.2021.151081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Local treatment plays a key role for patients' outcome in tumors of the urogenital tract in children. Despite a great variety of different etiologies, the specific localization of pediatric urogenital tumors renders several characteristic demands to the treating personnel. Surgery and radiotherapy are the main elements of local treatment in this group of neoplasms. Numerous new guidelines and innovative technical developments of surgery and radiotherapy have recently been integrated into treatment concepts for pediatric urogenital tumors. Due to the broadness of the field it is not possible to give a full overview over all aspects. Therefore, this article highlights the most important innovations and new guidelines of surgery and radiotherapy of pediatric urogenital tumors.
Collapse
Affiliation(s)
- Fuchs J
- Department of Pediatric Surgery and Pediatric Urology, University Children´s Hospital Tuebingen, Tuebingen, Germany.
| | - Schmidt A
- Department of Pediatric Surgery and Pediatric Urology, University Children´s Hospital Tuebingen, Tuebingen, Germany
| | - Ellerkamp V
- Department of Pediatric Surgery and Pediatric Urology, University Children´s Hospital Tuebingen, Tuebingen, Germany
| | - Paulsen F
- Department of Radiation Oncology, University Hospital Tuebingen, Tuebingen, Germany
| | - Melchior P
- Department of Radiotherapy and Radiation Oncology, University Hospital, Homburg, Germany
| | - Timmermann B
- Department of Particle Therapy, West German Proton Therapy Centre, University Hospital Essen, Essen, Germany
| | - Warmann Sw
- Department of Pediatric Surgery and Pediatric Urology, University Children´s Hospital Tuebingen, Tuebingen, Germany
| |
Collapse
|
20
|
Buszek SM, Ludmir EB, Grosshans DR, McAleer MF, McGovern SL, Harrison DJ, Okcu MF, Chintagumpala MM, Mahajan A, Paulino AC. Disease Control and Patterns of Failure After Proton Beam Therapy for Rhabdomyosarcoma. Int J Radiat Oncol Biol Phys 2021; 109:718-725. [PMID: 33516439 DOI: 10.1016/j.ijrobp.2020.09.050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 08/03/2020] [Accepted: 09/22/2020] [Indexed: 10/22/2022]
Abstract
PURPOSE Pediatric patients with rhabdomyosarcoma (RMS) are treated with multimodal therapy, often with radiation therapy (RT) as part of local therapy. We report on the efficacy and patterns of failure after proton beam therapy (PBT) for RMS. METHODS AND MATERIALS Between January 2006 and February 2017, patients with RMS were enrolled in a prospective institutional review board-approved registry protocol for pediatric patients undergoing PBT. Demographics, clinical characteristics, and treatment related outcomes were reviewed. RESULTS Ninety-four RMS patients were treated with a combination of chemotherapy (CT) and PBT. The majority of patients had head and neck (49%) and genitourinary (30%) primaries. Median tumor size was 4.1 cm (range, 1.0-16.5 cm); 33 patients (35%) had primary tumors >5 cm. Median cyclophosphamide equivalent dose was 14.4 g/m2 (range, 0-30.8 g/m2). Median time from CT initiation to RT initiation was 13 weeks (range, 1-58 weeks). With median follow-up of 4 years, 4-year overall survival (OS) was 71%, and 4-year progression-free survival (PFS) was 63%. Thirty patients (32%) experienced relapse (13% with local failure [LF]). Four-year local control (LC) was 85% overall; 4-year LC rates were 100% for low-risk, 85% for intermediate-risk, and 55% for high-risk patients (P = .02). Tumor size predicted LC (P = .007), with 7% versus 33% LF rate by tumor size (≤5 cm vs >5 cm). Delayed RT delivery (≥13 weeks from initiation of CT) predicted worse LC (P = .01). Increased tumor size predicted both inferior PFS (P = .02) and OS (P = .01). Delayed RT delivery predicted both inferior PFS (P = .04) and OS (P = .03). CONCLUSIONS PBT provides LC comparable to prior studies using photon RT. Inferior LC, PFS, and OS rates were observed for patients with larger tumors and those treated with delayed RT. This finding supports ongoing prospective efforts to dose-escalate treatment of tumors >5 cm; however, these data call into question the optimal timing of local therapy, particularly for patients treated with reduced-dose cyclophosphamide.
Collapse
Affiliation(s)
- Samantha M Buszek
- Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Ethan B Ludmir
- Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - David R Grosshans
- Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Mary Frances McAleer
- Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Susan L McGovern
- Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Douglas J Harrison
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - M Fatih Okcu
- Department of Pediatrics, Texas Children's Cancer Center, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas
| | - Murali M Chintagumpala
- Department of Pediatrics, Texas Children's Cancer Center, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas
| | - Anita Mahajan
- Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota
| | - Arnold C Paulino
- Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas.
| |
Collapse
|
21
|
Doyen J, Aloi D, Groulier A, Vidal M, Lesueur P, Calugaru V, Bondiau PY. Role of proton therapy in reirradiation and in the treatment of sarcomas. Cancer Radiother 2021; 25:550-553. [PMID: 34284969 DOI: 10.1016/j.canrad.2021.06.024] [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: 05/31/2021] [Revised: 06/11/2021] [Accepted: 06/16/2021] [Indexed: 01/12/2023]
Abstract
Reirradiation and irradiation of sarcoma is often difficult due to the frequent need for a high dose of radiation in order to increase tumor control. This can result in a greater risk of toxicity which can be mitigated with the use of proton therapy. The present review aims to summarize the role of proton therapy in these 2 clinical contexts.
Collapse
Affiliation(s)
- J Doyen
- Department of radiation oncology, Centre Antoine-Lacassagne, University of Côte d'Azur, 33, avenue de Valombrose, 06189 Nice, France.
| | - D Aloi
- Department of radiation oncology, Centre Antoine-Lacassagne, University of Côte d'Azur, 33, avenue de Valombrose, 06189 Nice, France
| | - A Groulier
- Department of radiation oncology, Centre Antoine-Lacassagne, University of Côte d'Azur, 33, avenue de Valombrose, 06189 Nice, France
| | - M Vidal
- Department of radiation oncology, Centre Antoine-Lacassagne, University of Côte d'Azur, 33, avenue de Valombrose, 06189 Nice, France
| | - P Lesueur
- Department of radiation oncology, Centre François Baclesse, Centre de Protonthérapie de Normandie, University of Caen Normandie, Caen, France
| | - V Calugaru
- Department of radiation oncology, Institut Curie, Centre de Protonthérapie d'Orsay, Orsay, France
| | - P Y Bondiau
- Department of radiation oncology, Centre Antoine-Lacassagne, University of Côte d'Azur, 33, avenue de Valombrose, 06189 Nice, France
| |
Collapse
|
22
|
Abstract
This is the case of a parameningeal alveolar rhabdomyosarcoma (ARMS) in a 13-year-old boy who presented with painless loss of vision in the right eye, but very few other physical signs. The ARMS diagnosis was confirmed with imaging and molecular characterisation of the tumour. Despite tolerating the initial chemotherapy and radiotherapy regimens, there was leptomeningeal recurrence and the patient unfortunately passed away. Parameningeal ARMS occurs in an area of the body, which leads to a wide variety of possible presenting symptoms, creating a long list of differentials that can delay treatment. This tumour subtype has a poor prognosis, and due to the location of the tumour around vital structures in the head, treatment toxicities must be taken into account. This highlights the necessity for having a strong index of suspicion for this tumour in atypical presentations in children, and the necessity for prompt treatment to prevent leptomeningeal disease from occurring.
Collapse
Affiliation(s)
- Abhinav Kumar
- Medical School, University College London, London, UK
| | - Vijay Pothula
- ENT Department, Wrightington Wigan and Leigh NHS Foundation Trust, Wigan, UK
| |
Collapse
|
23
|
Spiotto MT, McGovern SL, Gunn GB, Grosshans D, McAleer MF, Frank SJ, Paulino AC. Proton Radiotherapy to Reduce Late Complications in Childhood Head and Neck Cancers. Int J Part Ther 2021; 8:155-167. [PMID: 34285943 PMCID: PMC8270100 DOI: 10.14338/ijpt-20-00069.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Accepted: 12/07/2020] [Indexed: 11/21/2022] Open
Abstract
In most childhood head and neck cancers, radiotherapy is an essential component of treatment; however, it can be associated with problematic long-term complications. Proton beam therapy is accepted as a preferred radiation modality in pediatric cancers to minimize the late radiation side effects. Given that childhood cancers are a rare and heterogeneous disease, the support for proton therapy comes from risk modeling and a limited number of cohort series. Here, we discuss the role of proton radiotherapy in pediatric head and neck cancers with a focus on reducing radiation toxicities. First, we compare the efficacy and expected toxicities in proton and photon radiotherapy for childhood cancers. Second, we review the benefit of proton radiotherapy in reducing acute and late radiation toxicities, including risks for secondary cancers, craniofacial development, vision, and cognition. Finally, we review the cost effectiveness for proton radiotherapy in pediatric head and neck cancers. This review highlights the benefits of particle radiotherapy for pediatric head and neck cancers to improve the quality of life in cancer survivors, to reduce radiation morbidities, and to maximize efficient health care use.
Collapse
Affiliation(s)
- Michael T Spiotto
- Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Susan L McGovern
- Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - G Brandon Gunn
- Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - David Grosshans
- Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Mary Frances McAleer
- Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Steven J Frank
- Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Arnold C Paulino
- Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| |
Collapse
|
24
|
Mizumoto M, Fuji H, Miyachi M, Soejima T, Yamamoto T, Aibe N, Demizu Y, Iwata H, Hashimoto T, Motegi A, Kawamura A, Terashima K, Fukushima T, Nakao T, Takada A, Sumi M, Oshima J, Moriwaki K, Nozaki M, Ishida Y, Kosaka Y, Ae K, Hosono A, Harada H, Ogo E, Akimoto T, Saito T, Fukushima H, Suzuki R, Takahashi M, Matsuo T, Matsumura A, Masaki H, Hosoi H, Shigematsu N, Sakurai H. Proton beam therapy for children and adolescents and young adults (AYAs): JASTRO and JSPHO Guidelines. Cancer Treat Rev 2021; 98:102209. [PMID: 33984606 DOI: 10.1016/j.ctrv.2021.102209] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 04/02/2021] [Accepted: 04/11/2021] [Indexed: 11/19/2022]
Abstract
Children and adolescents and young adults (AYAs) with cancer are often treated with a multidisciplinary approach. This includes use of radiotherapy, which is important for local control, but may also cause adverse events in the long term, including second cancer. The risks for limited growth and development, endocrine dysfunction, reduced fertility and second cancer in children and AYAs are reduced by proton beam therapy (PBT), which has a dose distribution that decreases irradiation of normal organs while still targeting the tumor. To define the outcomes and characteristics of PBT in cancer treatment in pediatric and AYA patients, this document was developed by the Japanese Society for Radiation Oncology (JASTRO) and the Japanese Society of Pediatric Hematology/Oncology (JSPHO).
Collapse
Affiliation(s)
- Masashi Mizumoto
- Departments of Radiation Oncology, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Hiroshi Fuji
- Department of Radiology and National Center for Child Health and Development, Tokyo, Japan
| | - Mitsuru Miyachi
- Department of Pediatrics, Kyoto Prefectural University of Medicine Graduate School of Medical Science, Kyoto, Japan
| | - Toshinori Soejima
- Department of Radiation Oncology, Hyogo Ion Beam Medical Center Kobe Proton Center, Kobe, Hyogo, Japan
| | - Tetsuya Yamamoto
- Department of Neurosurgery, Graduate School of Medicine, Yokohama City University, Yokohama, Kanagawa, Japan
| | - Norihiro Aibe
- Department of Radiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yusuke Demizu
- Department of Radiation Oncology, Hyogo Ion Beam Medical Center Kobe Proton Center, Kobe, Hyogo, Japan
| | - Hiromitsu Iwata
- Department of Radiation Oncology, Nagoya Proton Therapy Center, Nagoya City University West Medical Center, Nagoya, Aichi, Japan
| | - Takayuki Hashimoto
- Department of Radiation Biomedical Science and Engineering, Faculty of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Atsushi Motegi
- Department of Radiation Oncology, National Cancer Center Hospital East, Chiba, Japan
| | - Atsufumi Kawamura
- Department of Neurosurgery, Hyogo Prefectural Kobe Children's Hospital, Kobe, Hyogo, Japan
| | - Keita Terashima
- Children's Cancer Center, National Center for Child Health and Development, Tokyo, Japan
| | - Takashi Fukushima
- Department of Pediatric Hematology and Oncology, Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - Tomohei Nakao
- Department of Pediatrics, Dokkyo Medical University Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Akinori Takada
- Department of Radiology, Mie University Hospital, Tsu-shi, Mie, Japan
| | - Minako Sumi
- Department of Radiation Oncology and Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo, Japan; Department of Radiation Oncology, Tokyo Metropolitan Geriatric Hospital, Tokyo, Japan
| | | | - Kensuke Moriwaki
- Department of Medical Statistics, Kobe Pharmaceutical University, Kobe, Hyogo, Japan
| | - Miwako Nozaki
- Department of Radiology, Dokkyo Medical University Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Yuji Ishida
- Department of Pediatrics, Shizuoka Cancer Center Hospital, Nagaizumi, Shizuoka, Japan
| | - Yoshiyuki Kosaka
- Department of Hematology and Oncology, Hyogo Prefectural Kobe Children's Hospital, Kobe, Hyogo, Japan
| | - Keisuke Ae
- Department of Orthopaedic Oncology, Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Ako Hosono
- Department of Pediatric Oncology, National Cancer Center Hospital East, Chiba, Japan
| | - Hideyuki Harada
- Division of Radiation Therapy, Shizuoka Cancer Center Hospital, Nagaizumi, Shizuoka, Japan
| | - Etsuyo Ogo
- Department of Radiology, Kurume University School of Medicine, Kurume, Fukuoka, Japan
| | - Tetsuo Akimoto
- Department of Radiation Oncology, National Cancer Center Hospital East, Chiba, Japan
| | - Takashi Saito
- Departments of Radiation Oncology, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Hiroko Fukushima
- Department of Child Health, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Ryoko Suzuki
- Department of Child Health, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Mitsuru Takahashi
- Department of Orthopaedic Oncology, Shizuoka Cancer Center Hospital, Nagaizumi, Shizuoka, Japan
| | - Takayuki Matsuo
- Department of Neurosurgery, Nagasaki University Graduate School of Medicine, Nagasaki, Japan
| | - Akira Matsumura
- Departments of Neurosurgery, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Hidekazu Masaki
- Proton Therapy Center, Aizawa Hospital, Matsumoto, Nagano, Japan
| | - Hajime Hosoi
- Department of Pediatrics, Kyoto Prefectural University of Medicine Graduate School of Medical Science, Kyoto, Japan
| | - Naoyuki Shigematsu
- Department of Radiology, Keio University School of Medicine, Tokyo, Japan
| | - Hideyuki Sakurai
- Departments of Radiation Oncology, University of Tsukuba, Tsukuba, Ibaraki, Japan.
| |
Collapse
|
25
|
Intensity-modulated proton therapy for oropharyngeal cancer reduces rates of late xerostomia. Radiother Oncol 2021; 160:32-39. [PMID: 33839202 DOI: 10.1016/j.radonc.2021.03.036] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 03/23/2021] [Accepted: 03/28/2021] [Indexed: 01/13/2023]
Abstract
BACKGROUND AND PURPOSE To determine rates of xerostomia after intensity-modulated radiotherapy (IMRT) or intensity-modulated proton therapy (IMPT) for oropharyngeal cancer (OPC) and identify dosimetric factors associated with xerostomia risk. MATERIALS AND METHODS Patients with OPC who received IMRT (n = 429) or IMPT (n = 103) from January 2011 through June 2015 at a single institution were studied retrospectively. Every 3 months after treatment, each patient completed an eight-item self-reported xerostomia-specific questionnaire (XQ; summary XQ score, 0-100). An XQ score of 50 was selected as the demarcation value for moderate-severe (XQs ≥ 50) and no-mild (XQs < 50) xerostomia. The mean doses and percent volumes of organs at risk receiving various doses (V5-V70) were extracted from the initial treatment plans. The dosimetric variables and xerostomia risk were compared using an independent-sample t-test or chi-square test. RESULTS The median follow-up time was 36.2 months. The proportions of patients with moderate-severe xerostomia were similar in the two treatment groups up to 18 months after treatment. However, moderate-severe xerostomia was less common in the IMPT group than in the IMRT group at 18-24 months (6% vs. 20%; p = 0.025) and 24-36 months (6% vs. 20%; p = 0.01). During the late xerostomia period (24-36 months), high dose/volume exposures (V25-V70) in the oral cavity were associated with high proportions of patients with moderate-severe xerostomia (all p < 0.05), but dosimetric variables regarding the salivary glands were not associated with late xerostomia. CONCLUSION IMPT was associated with less late xerostomia than was IMRT in OPC patients. Oral cavity dosimetric variables were related to the occurrence of late xerostomia.
Collapse
|
26
|
Nosrati J, Olch AJ, Abel RJ, Wong K. Neoadjuvant Chemotherapy and Whole Ventricular Irradiation for Pure Intracranial Germinoma: A Comparison of Three Brain-Sparing Techniques. Cureus 2021; 13:e13670. [PMID: 33824821 PMCID: PMC8018490 DOI: 10.7759/cureus.13670] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Objective To quantitate and compare the dosimetric properties of three brain-sparing radiation therapy techniques for pure intracranial germinomas with dose-volume analysis of target and normal brain structures. Methods We identified 18 patients with central nervous system (CNS) germinoma who had achieved local control and had excellent neurocognitive outcomes. Four patients who were treated with a simultaneous integrated boost (SIB) plan of 22.5Gy to whole ventricle (WV) and 30Gy to primary were re-planned with 24Gy to WV-only and the Children's Oncology Group (COG) protocol of 18Gy to WV with a sequential boost to 30Gy. Organ-at-risk (OAR) doses for hippocampi, temporal lobes, whole brain, whole brain minus whole ventricles planning target volume (WB-WVPTV), WVPTV, and boost volume were comparatively studied. Results For patients treated with the SIB plan, an excellent neurocognitive function has previously been shown to be well preserved. Three-year event-free survival (EFS) and overall survival (OS) for this group have also previously been demonstrated (89.5% and 100%, respectively). Mean and integral OAR doses were comparable between SIB and WV-only plans but were lower for COG plans. Whole brain, whole brain minus WVPTV, and temporal lobe V20, V18, and V12, as well as hippocampi V20, V25, and V30, were comparable between SIB and WV-only plans but were lower for the COG plans. Conclusion Compared to the WV-only method, the SIB plan permits more dose to the primary site by 6 Gy without compromising neurocognitive control. While maintaining the 30Gy boost, the COG protocol reduces the WVPTV dose to 18Gy. It remains to be seen whether WV dose reduction risks reducing local control.
Collapse
Affiliation(s)
- Jason Nosrati
- Department of Radiation Medicine, Northwell Health Cancer Institute, Lake Success, USA
| | - Arthur J Olch
- Department of Radiation Oncology, Keck School of Medicine of the University of Southern California, Los Angeles, USA.,Radiation Oncology Program, Children's Hospital Los Angeles, Los Angeles, USA
| | - Ryan J Abel
- Radiation Oncology, Mitchell Memorial Cancer Center, Owensboro, USA
| | - Kenneth Wong
- Department of Radiation Oncology, Keck School of Medicine of the University of Southern California, Los Angeles, USA.,Radiation Oncology Program, Children's Hospital Los Angeles, Los Angeles, USA
| |
Collapse
|
27
|
Resham S, Raza MR, Qureshi BM, Rizvi A, Ashraf MS, Altaf S. Prognostic factors and their influence on therapeutic outcomes in children and adolescents with parameningeal rhabdomyosarcoma: A multicenter study from Pakistan. PEDIATRIC HEMATOLOGY ONCOLOGY JOURNAL 2021. [DOI: 10.1016/j.phoj.2020.02.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
28
|
[Proton therapy-a chance in the treatment of tumors of the head and neck and base of skull]. Radiologe 2020; 60:1058-1065. [PMID: 33025134 DOI: 10.1007/s00117-020-00762-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND Radiotherapy (RT) is an integral part of the treatment of many tumors located in the vicinity of sensitive organs and structures, including tumors of the head and neck and base of skull in particular. Due to the risk of side effects associated with RT, the use of highly conformal RT techniques is favored. For many indications, proton therapy (PT) is therefore already part of the modern treatment standard. OBJECTIVE This article presents an overview of current indications for PT with emphasis on tumors in the head and neck region and the base of skull. Furthermore, a summary and discussion of relevant results and current developments are included. MATERIALS AND METHODS The work comprises an evaluation of relevant studies and an overview of current issues related to PT of tumors in the areas of the head, neck, and base of skull. RESULTS Overall, the studies on PT show promising results. In addition to dosimetric studies, clinical studies also point to advantages of PT, especially with regard to the reduction of side effects. DISCUSSION Currently, use of the model-based approach is being discussed. This is intended to identify those patients who benefit most from PT based on the normal tissue complication probability (NTCP). PT for re-RT is also discussed.
Collapse
|
29
|
Timmermann B. [Proton therapy-a chance in the treatment of tumors of the head and neck and base of skull]. HNO 2020; 68:640-647. [PMID: 32780222 DOI: 10.1007/s00106-020-00915-z] [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] [Indexed: 12/22/2022]
Abstract
BACKGROUND Radiotherapy (RT) is an integral part of the treatment of many tumors located in the vicinity of sensitive organs and structures, including tumors of the head and neck and base of skull in particular. Due to the risk of side effects associated with RT, the use of highly conformal RT techniques is favored. For many indications, proton therapy (PT) is therefore already part of the modern treatment standard. OBJECTIVE This article presents an overview of current indications for PT with emphasis on tumors in the head and neck region and the base of skull. Furthermore, a summary and discussion of relevant results and current developments are included. MATERIALS AND METHODS The work comprises an evaluation of relevant studies and an overview of current issues related to PT of tumors in the areas of the head, neck, and base of skull. RESULTS Overall, the studies on PT show promising results. In addition to dosimetric studies, clinical studies also point to advantages of PT, especially with regard to the reduction of side effects. DISCUSSION Currently, use of the model-based approach is being discussed. This is intended to identify those patients who benefit most from PT based on the normal tissue complication probability (NTCP). PT for re-RT is also discussed.
Collapse
Affiliation(s)
- Beate Timmermann
- Klinik für Partikeltherapie, Westdeutsches Protonentherapiezentrum Essen, Universitätsklinikum Essen, Hufelandstr. 55, 45147, Essen, Deutschland.
| |
Collapse
|
30
|
Miwa S, Yamamoto N, Hayashi K, Takeuchi A, Igarashi K, Tsuchiya H. Recent Advances and Challenges in the Treatment of Rhabdomyosarcoma. Cancers (Basel) 2020; 12:cancers12071758. [PMID: 32630642 PMCID: PMC7409313 DOI: 10.3390/cancers12071758] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/22/2020] [Accepted: 06/30/2020] [Indexed: 02/06/2023] Open
Abstract
Rhabdomyosarcoma, the most common soft tissue sarcoma noted in childhood, requires multimodality treatment, including chemotherapy, surgical resection, and/or radiation therapy. The majority of the patients with localized rhabdomyosarcoma can be cured; however, the long-term outcomes in patients with metastatic rhabdomyosarcoma remain poor. The standard chemotherapy regimen for patients with rhabdomyosarcoma is the combination of vincristine, actinomycin, and cyclophosphamide/ifosfamide. In recent clinical trials, modifications of the standard chemotherapy protocol have shown improvements in the outcomes in patients with rhabdomyosarcoma. In various type of malignancies, new treatments, such as molecular targeted drugs and immunotherapies, have shown superior clinical outcomes compared to those of standard treatments. Therefore, it is necessary to assess the benefits of these treatments in patients with rhabdomyosarcoma. Moreover, recent basic and clinical studies on rhabdomyosarcoma have reported promising therapeutic targets and novel therapeutic approaches. This article reviews the recent challenges and advances in the management of rhabdomyosarcoma.
Collapse
|
31
|
Modern Radiotherapy for Pediatric Brain Tumors. Cancers (Basel) 2020; 12:cancers12061533. [PMID: 32545204 PMCID: PMC7352417 DOI: 10.3390/cancers12061533] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 06/05/2020] [Accepted: 06/06/2020] [Indexed: 12/14/2022] Open
Abstract
Cancer is a leading cause of death in children with tumors of the central nervous system, the most commonly encountered solid malignancies in this population. Radiotherapy (RT) is an integral part of managing brain tumors, with excellent long-term survival overall. The tumor histology will dictate the volume of tissue requiring treatment and the dose. However, radiation in developing children can yield functional deficits and/or cosmetic defects and carries a risk of second tumors. In particular, children receiving RT are at risk for neurocognitive effects, neuroendocrine dysfunction, hearing loss, vascular anomalies and events, and psychosocial dysfunction. The risk of these late effects is directly correlated with the volume of tissue irradiated and dose delivered and is inversely correlated with age. To limit the risk of developing these late effects, improved conformity of radiation to the target volume has come from adopting a volumetric planning process. Radiation beam characteristics have also evolved to achieve this end, as exemplified through development of intensity modulated photons and the use of protons. Understanding dose limits of critical at-risk structures for different RT modalities is evolving. In this review, we discuss the physical basis of the most common RT modalities used to treat pediatric brain tumors (intensity modulated radiation therapy and proton therapy), the RT planning process, survival outcomes for several common pediatric malignant brain tumor histologies, RT-associated toxicities, and steps taken to mitigate the risk of acute and late effects from treatment.
Collapse
|
32
|
Indelicato DJ, Rotondo RL, Krasin MJ, Mailhot Vega RB, Uezono H, Bradfield S, Agarwal V, Morris CG, Bradley JA. Outcomes Following Proton Therapy for Group III Pelvic Rhabdomyosarcoma. Int J Radiat Oncol Biol Phys 2020; 106:968-976. [DOI: 10.1016/j.ijrobp.2019.12.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/19/2019] [Accepted: 12/21/2019] [Indexed: 01/20/2023]
|
33
|
Greenberger BA, Yock TI. The role of proton therapy in pediatric malignancies: Recent advances and future directions. Semin Oncol 2020; 47:8-22. [PMID: 32139101 DOI: 10.1053/j.seminoncol.2020.02.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 02/03/2020] [Accepted: 02/03/2020] [Indexed: 11/11/2022]
Abstract
Proton radiotherapy has promised an advantage in safely treating pediatric malignancies with an increased capability to spare normal tissues, reducing the risk of both acute and late toxicity. The past decade has seen the proliferation of more than 30 proton facilities in the United States, with increased capacity to provide access to approximately 3,000 children per year who will require radiotherapy for their disease. We provide a review of the initial efforts to describe outcomes after proton therapy across the common pediatric disease sites. We discuss the main attempts to assess comparative efficacy between proton and photon radiotherapy concerning toxicity. We also discuss recent efforts of multi-institutional registries aimed at accelerating research to better define the optimal treatment paradigm for children requiring radiotherapy for cure.
Collapse
Affiliation(s)
- Benjamin A Greenberger
- Department of Radiation Oncology, Sidney Kimmel Medical College & Cancer Center at Thomas Jefferson University, Philadelphia, PA
| | - Torunn I Yock
- Department of Radiation Oncology, Massachusetts General Hospital/Harvard Medical School, Francis H. Burr Proton Therapy Center, Boston, MA.
| |
Collapse
|
34
|
Urgent Proton Beam Therapy With Interinstitutional Transfer for Patients With Intracranial Rhabdomyosarcoma: Report of 3 Cases. J Pediatr Hematol Oncol 2020; 42:e12-e17. [PMID: 31688631 DOI: 10.1097/mph.0000000000001620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A number of cases have been reported in recent years regarding the use of proton beam therapy to mitigate adverse events affecting important cranial organs in cases of rhabdomyosarcoma at parameningeal sites. However, few reports have described the use of proton beam therapy as urgent radiotherapy for parameningeal rhabdomyosarcoma with intracranial extension. We treated 3 patients diagnosed with parameningeal rhabdomyosarcoma extending into the cranium who were assessed at other hospitals as suitable for urgent radiotherapy and transferred to our hospital for proton beam therapy. These patients comprised 2 boys and 1 girl 6 to 12 years of age at diagnosis, and proton beam therapy was started on days 5, 11, and 23 after diagnosis, respectively. Patients with parameningeal rhabdomyosarcoma extending into the cranium can be transferred to institutions equipped to perform proton beam therapy. To minimize the interval to starting therapy, medical information should be shared with institutions capable of providing such therapy as soon as the possibility of intracranial soft-tissue sarcoma is recognized. Proton beam therapy is 1 option for radiotherapy in cases of intracranial rhabdomyosarcoma.
Collapse
|
35
|
Sardaro A, Carbonara R, Petruzzelli MF, Turi B, Moschetta M, Scardapane A, Stabile Ianora AA. Proton therapy in the most common pediatric non-central nervous system malignancies: an overview of clinical and dosimetric outcomes. Ital J Pediatr 2019; 45:170. [PMID: 31881905 PMCID: PMC6935184 DOI: 10.1186/s13052-019-0763-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 12/17/2019] [Indexed: 11/20/2022] Open
Abstract
Radiation therapy represents an important approach in the therapeutic management of children and adolescents with malignant tumors and its application with modern techniques – including Proton Beam Therapy (PBT) – is of great interest. In particular, potential radiation-induced injuries and secondary malignancies – also associated to the prolonged life expectancy of patients – are still questions of concern that increase the debate on the usefulness of PBT in pediatric treatments. This paper presents a literary review of current applications of PBT in non-Central Nervous System pediatric tumors (such as retinoblastoma, Hodgkin Lymphoma, Wilms tumor, bone and soft tissues sarcomas). We specifically reported clinical results achieved with PBT and dosimetric comparisons between PBT and the most common photon-therapy techniques. The analysis emphasizes that PBT minimizes radiation doses to healthy growing organs, suggesting for reduced risks of late side-effects and radiation-induced secondary malignancies. Extended follow up and confirms by prospective clinical trials should support the effectiveness and long-term tolerance of PBT in the considered setting.
Collapse
Affiliation(s)
- Angela Sardaro
- Interdisciplinary Department of Medicine, Section of Radiology and Radiation Oncology, University of Bari, p.zza Giulio Cesare nr.11, 70124, Bari, Italy
| | - Roberta Carbonara
- Interdisciplinary Department of Medicine, Section of Radiology and Radiation Oncology, University of Bari, p.zza Giulio Cesare nr.11, 70124, Bari, Italy.
| | - Maria Fonte Petruzzelli
- Interdisciplinary Department of Medicine, Section of Radiology and Radiation Oncology, University of Bari, p.zza Giulio Cesare nr.11, 70124, Bari, Italy
| | - Barbara Turi
- Interdisciplinary Department of Medicine, Section of Radiology and Radiation Oncology, University of Bari, p.zza Giulio Cesare nr.11, 70124, Bari, Italy
| | - Marco Moschetta
- Interdisciplinary Department of Medicine, Section of Radiology and Radiation Oncology, University of Bari, p.zza Giulio Cesare nr.11, 70124, Bari, Italy
| | - Arnaldo Scardapane
- Interdisciplinary Department of Medicine, Section of Radiology and Radiation Oncology, University of Bari, p.zza Giulio Cesare nr.11, 70124, Bari, Italy
| | - Amato Antonio Stabile Ianora
- Interdisciplinary Department of Medicine, Section of Radiology and Radiation Oncology, University of Bari, p.zza Giulio Cesare nr.11, 70124, Bari, Italy
| |
Collapse
|
36
|
Chen C, Dorado Garcia H, Scheer M, Henssen AG. Current and Future Treatment Strategies for Rhabdomyosarcoma. Front Oncol 2019; 9:1458. [PMID: 31921698 PMCID: PMC6933601 DOI: 10.3389/fonc.2019.01458] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 12/05/2019] [Indexed: 12/31/2022] Open
Abstract
Rhabdomyosarcoma (RMS) is the most common soft tissue sarcoma in children, and can be subcategorized histologically and/or based on PAX-FOXO1 fusion gene status. Over the last four decades, there have been no significant improvements in clinical outcomes for advanced and metastatic RMS patients, underscoring a need for new treatment options for these groups. Despite significant advancements in our understanding of the genomic landscape and underlying biological mechanisms governing RMS that have informed the identification of novel therapeutic targets, development of these therapies in clinical trials has lagged far behind. In this review, we summarize the current frontline multi-modality therapy for RMS according to pediatric protocols, highlight emerging targeted therapies and immunotherapies identified by preclinical studies, and discuss early clinical trial data and the implications they hold for future clinical development.
Collapse
Affiliation(s)
- Celine Chen
- Department of Pediatric Oncology/Hematology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Heathcliff Dorado Garcia
- Department of Pediatric Oncology/Hematology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Monika Scheer
- Pediatrics 5, Klinikum Stuttgart, Olgahospital, Stuttgart, Germany
| | - Anton G. Henssen
- Department of Pediatric Oncology/Hematology, Charité-Universitätsmedizin Berlin, Berlin, Germany
- Berlin Institute of Health, Berlin, Germany
- German Cancer Consortium (DKTK), Partner Site Berlin, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Experimental and Clinical Research Center (ECRC) of the MDC and Charité Berlin, Berlin, Germany
| |
Collapse
|
37
|
Doyen J, Jazmati D, Geismar D, Frisch S, Schulze Schleithoff S, Vermeren X, Scheer M, Blasé C, Tippelt S, Timmermann B. In Reply to Gultekin and Yildiz. Int J Radiat Oncol Biol Phys 2019; 105:1164-1165. [DOI: 10.1016/j.ijrobp.2019.09.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 09/04/2019] [Accepted: 09/04/2019] [Indexed: 10/25/2022]
|
38
|
Hoogeveen RC, Hol MLF, Pieters BR, Balgobind BV, Berkhout EWER, Schoot RA, Smeele LE, Merks HJHM, Becking EAG. An overview of radiological manifestations of acquired dental developmental disturbances in paediatric head and neck cancer survivors. Dentomaxillofac Radiol 2019; 49:20190275. [PMID: 31714151 DOI: 10.1259/dmfr.20190275] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVES In paediatric cancer survivors treated with chemotherapy and radiotherapy therapy, late effects on dental development are quite common. Oral radiologists are not familiar with the radiographic images of these specific dental consequences of chemotherapy and radiotherapy. With the goal of educating colleagues, to raise awareness of the needs of survivors, and to identify directions for future research, we present dental radiographs of survivors treated for head and neck rhabdomyosarcoma with chemotherapy and radiotherapy. Also, based on the survivors reviewed, a radiographic inventory of commonly found late dental developmental effects seen in conjunction with treatment is presented. METHODS Panoramic radiographic findings of five illustrative cases are presented, from a group of 42 survivors of head and neck rhabdomyosarcoma treated at the Academic Medical Center Amsterdam, The Netherlands over the past 25 years. RESULTS Five cases showing dental developmental disorders are presented. These cases show an association of the location of the radiation field and the developmental stage of the teeth with the severity of the effect on dental development. We also report an inventory of severe and moderate effects of chemotherapy and radiotherapy on the development of molars and anterior teeth. CONCLUSIONS This paper presents five cases and a radiographic inventory to illustrate disturbances of dental development associated with chemotherapy and radiotherapy in children. Medical and dental professionals involved in the treatment of cancer survivors are relatively unaware of the dental consequences of radiation therapy and the age dependency of specific regional effects. These effects can be severe, with great impact on quality of life. Further research in this area could help improve planning of radiation therapy for children, potentially preventing or limiting dental or maxillofacial sequelae.
Collapse
Affiliation(s)
- Reinier C Hoogeveen
- Department of Oral and Maxillofacial Radiology, Academic Center for Dentistry Amsterdam ACTA, Amsterdam, The Netherlands
| | - Marinka L F Hol
- Department of Oral and Maxillofacial Surgery, Amsterdam UMC University of Amsterdam, Amsterdam, The Netherlands
| | - Bradley R Pieters
- Department of Radiation Oncology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Brian V Balgobind
- Department of Radiation Oncology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Erwin W E R Berkhout
- Department of Oral and Maxillofacial Radiology, Academic Center for Dentistry Amsterdam ACTA, Amsterdam, The Netherlands
| | - Reineke A Schoot
- Princess Máxima Center for paediatric oncology, Utrecht, The Netherlands
| | - Ludi E Smeele
- Department of Oral and Maxillofacial Surgery, Amsterdam UMC University of Amsterdam, Amsterdam, The Netherlands
| | - Hans J H M Merks
- Princess Máxima Center for paediatric oncology, Utrecht, The Netherlands
| | - Eddy A G Becking
- Department of Oral and Maxillofacial Surgery, Amsterdam University Medical Centers University of Amsterdam, Amsterdam, The Netherlands
| |
Collapse
|
39
|
Buszek SM, Ludmir EB, Grosshans DR, McAleer MF, McGovern SL, Harrison DJ, Okcu MF, Chintagumpala MM, Mahajan A, Paulino AC. Patterns of failure and toxicity profile following proton beam therapy for pediatric bladder and prostate rhabdomyosarcoma. Pediatr Blood Cancer 2019; 66:e27952. [PMID: 31397065 DOI: 10.1002/pbc.27952] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 06/19/2019] [Accepted: 07/18/2019] [Indexed: 12/16/2022]
Abstract
PURPOSE/OBJECTIVE(S) Bladder and prostate are unfavorable sites for rhabdomyosarcoma (B/P-RMS), and represent a challenging location for radiotherapy. MATERIALS/METHODS Nineteen patients with B/P-RMS were enrolled on a prospective registry protocol (2008-2017) and treated with chemotherapy, proton beam therapy (PBT), and surgical resection (n = 8; 42%). Emphasis was given to treatment technique, disease-related outcomes, and toxicity associated with PBT. RESULTS The majority of patients had bladder RMS (74%) of embryonal histology (95%), Group III (68%), and intermediate-risk disease by Children's Oncology Group (COG) risk stratification (89%). Seven patients (37%) had primary tumors >5 cm in size. All patients were treated according to COG protocols. With a median follow-up of 66.2 months, 5-year overall survival (OS) and progression-free survival (PFS) were 76%. Four patients (21%) experienced disease relapse, all presenting with local failure. The 5-year local control (LC) rate was 76%. Tumor size predicted LC, with 5-year LC for patients with >5 cm tumors being 43% versus 100% for those with ≤5 cm tumors (P = .006). Univariate analysis demonstrated an effect of tumor size on OS (tumor >5 cm, hazard ratio [HR] 17.7, P = .049) and PFS (HR 17.7, P = .049). Acute grade 2 toxicity was observed in two patients (11%, transient proctitis). Late grade 2+ toxicity was observed in three patients (16%; n = 1 grade 2 skeletal deformity; n = 3 transient grade 2 urinary incontinence; one patient experienced both). CONCLUSIONS PBT for B/P-RMS affords promising disease-related outcomes with an acceptable toxicity profile. Higher local failure rates were observed for larger tumors, supporting dose-escalation components of ongoing RMS clinical trials.
Collapse
Affiliation(s)
- Samantha M Buszek
- Department of Radiation Oncology, Division of Pediatrics, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Ethan B Ludmir
- Department of Radiation Oncology, Division of Pediatrics, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - David R Grosshans
- Department of Radiation Oncology, Division of Pediatrics, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Mary F McAleer
- Department of Radiation Oncology, Division of Pediatrics, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Susan L McGovern
- Department of Radiation Oncology, Division of Pediatrics, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Douglas J Harrison
- Department of Pediatrics, Texas Children's Cancer Center, Baylor College of Medicine, Houston, Texas
| | - M Fatih Okcu
- Department of Pediatrics, Texas Children's Cancer Center, Baylor College of Medicine, Houston, Texas
| | - Murali M Chintagumpala
- Department of Pediatrics, Texas Children's Cancer Center, Baylor College of Medicine, Houston, Texas
| | - Anita Mahajan
- Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota
| | - Arnold C Paulino
- Department of Radiation Oncology, Division of Pediatrics, University of Texas MD Anderson Cancer Center, Houston, Texas
| |
Collapse
|
40
|
Dose-Effect Analysis of Early Changes in Orbital Bone Morphology After Radiation Therapy for Rhabdomyosarcoma. Pract Radiat Oncol 2019; 10:53-58. [PMID: 31629089 DOI: 10.1016/j.prro.2019.10.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 10/01/2019] [Accepted: 10/02/2019] [Indexed: 11/22/2022]
Abstract
PURPOSE In survivors of orbital embryonal rhabdomyosarcoma (ERMS), late effects include facial deformation and asymmetry. We sought to quantify orbital asymmetry in ERMS survivors and characterize the dose effect of radiation to the orbital bones. METHODS AND MATERIALS We evaluated the most recent follow-up magnetic resonance imaging (MRI) in 17 children (≤21 years old) with stage 1 group III orbital ERMS treated with proton therapy between 2007 and 2018. For all patients, the orbital socket volumes were calculated and compared with the contralateral, unirradiated orbital socket. Patient age, orbital tumor quadrant, and the radiation dose delivered to the major orbital bones (maxillary, frontal, and zygomatic bones) were recorded and correlated with the orbital socket volume difference. RESULTS The mean age at diagnosis was 5.4 years old (range, 1.1-9.7 years). All patients received a prescription dose of 45 GyRBE. The mean time interval between radiation and MRI was 2.9 years (range, 0.8-3.2 years). The mean age at most recent MRI was 8.4 years (range, 2.3-12.9 years). In 16 of 17 patients, the volume of the ipsilateral orbit was significantly smaller than the contralateral orbit on follow-up MRI (P ≤ .0001). In one patient with nonviable tumor in situ, the irradiated orbit was larger. The volume difference increased with follow-up time and did not correlate with age at treatment or age at MRI. A dose >40 GyRBE to all bones of the orbital rim was associated with a significant decrease in orbital volume (P < .05), but an isolated dose of >40 GyRBE to either the frontal, maxillary, or zygomatic bone was not. CONCLUSIONS Despite the dosimetric precision of proton therapy, orbital asymmetry will develop after >40 GyRBE to multiple bones of the orbital rim. These data may be used to guide treatment planning and counsel patients on expected cosmesis.
Collapse
|
41
|
Indelicato DJ, Rotondo RL, Mailhot Vega RB, Uezono H, Bradfield S, Agarwal V, Hol ML, Bradley JA. 45 GyRBE for group III orbital embryonal rhabdomyosarcoma. Acta Oncol 2019; 58:1404-1409. [PMID: 31530120 DOI: 10.1080/0284186x.2019.1627412] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Purpose: Despite widespread concerns of radiotherapy toxicity in children with head and neck tumors, recent Children's Oncology Group (COG) findings suggest that the use of 45 Gy results in an unacceptably high rate of local recurrences in patients with low-risk orbital rhabdomyosarcoma. We therefore evaluated outcomes in our pediatric patients who received 45 GyRBE using proton therapy. Material and methods: To assess disease control and toxicity, we reviewed the medical records of 30 children (≤21 years old) with COG stage 1, group III embryonal orbital rhabdomyosarcoma enrolled on a prospective outcome study and treated with proton therapy between 2007 and 2018. Results: Median age at the time of radiation was 4.8 years old. Twenty-one and nine patients received ifosfamide- and cyclophosphamide-based chemotherapy according to their respective cooperative group regimens. Median duration between the start of induction chemotherapy and radiation was 12 weeks. Two patients had a complete response to induction chemotherapy and two had stable disease. Twenty-six patients had a partial response to induction chemotherapy, with a median volume reduction of 66%. With a median follow-up of 4.0 years (range, 0.5-9.5 years), we observed 1 local failure 6 months following treatment in a patient who had a partial response to cyclosphophomide-based induction chemotherapy. The 5-year local control, progression-free survival, and overall survival rates were 97%, 97%, and 100%, respectively. Serious late toxicities included 18 patients with cataracts, 4 with exposure keratoconjunctivitis resulting in permanently reduced visual acuity, and 1 with chronic sinusitis. Conclusion: 45 GyRBE offers effective local control for most patients with group III orbital rhabdomyosarcoma. The delivery of proton therapy to the postinduction tumor volume plus a small margin can mitigate early- and intermediate-term toxicity, but side effects still occur and long-term data are needed to demonstrate the dosimetric advantage of proton therapy.
Collapse
Affiliation(s)
- Daniel J. Indelicato
- Department of Radiation Oncology, College of Medicine, University of Florida, Jacksonville, FL, USA
| | - Ronny L. Rotondo
- Department of Radiation Oncology, College of Medicine, University of Florida, Jacksonville, FL, USA
| | - Raymond B. Mailhot Vega
- Department of Radiation Oncology, College of Medicine, University of Florida, Jacksonville, FL, USA
| | - Haruka Uezono
- Department of Radiation Oncology, College of Medicine, University of Florida, Jacksonville, FL, USA
| | - Scott Bradfield
- Department of Pediatric Oncology, Nemours Children’s Health System, Jacksonville, FL, USA
| | - Vibhuti Agarwal
- Department of Pediatric Oncology, Nemours Children’s Health System, Jacksonville, FL, USA
| | - Marinka L. Hol
- Department of Oral and Maxillofacial Surgery, Academic Medical Center, Amsterdam, The Netherlands
| | - Julie A. Bradley
- Department of Radiation Oncology, College of Medicine, University of Florida, Jacksonville, FL, USA
| |
Collapse
|
42
|
Abstract
Proton beam therapy is a highly conformal form of radiation therapy, which currently represents an important therapeutic component in multidisciplinary management in paediatric oncology. The precise adjustability of protons results in a reduction of radiation-related long-term side-effects and secondary malignancy induction, which is of particular importance for the quality of life. Proton irradiation has been shown to offer significant advantages over conventional photon-based radiotherapy, although the biological effectiveness of both irradiation modalities is comparable. This review evaluates current data from clinical and dosimetric studies on the treatment of tumours of the central nervous system, soft tissue and bone sarcomas of the head and neck region, paraspinal or pelvic region, and retinoblastoma. To date, the clinical results of irradiating childhood tumours with high-precision proton therapy are promising both with regard to tumour cure and the reduction of adverse events. Modern proton therapy techniques such as pencil beam scanning and intensity modulation are increasingly established modern facilities. However, further investigations with larger patient cohorts and longer follow-up periods are required, in order to be able to have clear evidence on clinical benefits.
Collapse
Affiliation(s)
- Heike Thomas
- Department of Particle Therapy, University Hospital Essen, West German Proton Therapy Centre Essen (WPE), West German Cancer Centre (WTZ), West German, Germany
| | - Beate Timmermann
- Department of Particle Therapy, University Hospital Essen, West German Proton Therapy Centre Essen (WPE), West German Cancer Centre (WTZ), West German, Germany.,German Cancer Consortium (DKTK), Essen, Germany
| |
Collapse
|
43
|
Bula C, Belosi MF, Eichin M, Hrbacek J, Meer D. Dynamic beam current control for improved dose accuracy in PBS proton therapy. Phys Med Biol 2019; 64:175003. [PMID: 31315104 DOI: 10.1088/1361-6560/ab3317] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The step-and-shoot method of pencil beam scanning delivers the dose on a 3D grid in the target volume, with one dimension defined by the proton energy. While the dose per pencil beam may vary substantially within an iso-energy layer, the beam current typically remains constant. In this static operation mode, the inherent latency of the beam switch-off mechanism results in a lower limit for the deliverable spot dose, which may prevent the application of some of the low-weighted spots prescribed by the treatment planning system. To overcome this limitation, we introduced dynamic beam current control at the PSI Gantry 2, an innovative new approach successfully commissioned and in clinical operation since fall 2017. The control system was enhanced with a direct link to the vertical deflector located at the centre of the cyclotron. This connection allows much faster beam current changes (~0.1 ms) and hence opens up the possibility of dynamically reducing the current for individual low-dose spots. We demonstrate that with this new dynamic operation mode, all spots are delivered as planned without compromising treatment time. We show by two independent and complementary methods that the delivered dose distribution is improved.
Collapse
Affiliation(s)
- C Bula
- Author to whom any correspondence should be addressed
| | | | | | | | | |
Collapse
|
44
|
Doyen J, Jazmati D, Geismar D, Frisch S, Schleithoff SS, Vermeren X, Scheer M, Blase C, Tippelt S, Timmermann B. Outcome and Patterns of Relapse in Childhood Parameningeal Rhabdomyosarcoma Treated With Proton Beam Therapy. Int J Radiat Oncol Biol Phys 2019; 105:1043-1054. [PMID: 31419513 DOI: 10.1016/j.ijrobp.2019.08.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 08/03/2019] [Accepted: 08/06/2019] [Indexed: 10/26/2022]
Abstract
PURPOSE The standard of care of childhood parameningeal rhabdomyosarcoma (pRMS) is chemotherapy and local radiation therapy. Protons are increasingly being used to decrease late effects. The aim of the present study is to analyze the pattern of relapse and the correlation with dosimetric factors in pRMS treated with proton therapy. METHODS AND MATERIALS This retrospective evaluation includes children treated in our institution for pRMS. Information on demographics, treatment, tumor characteristics, and toxicities and outcome was prospectively collected within the in-house registry. For patients presenting with local relapse, a fusion of the dosimetry with magnetic resonance imaging displaying site and geometry of recurrence was performed. RESULTS Median follow-up time was 2.9 years (0.5-4.7). Forty-six patients were identified in our institution between July 2013 and November 2017. Main characteristics of patients were as follows: 56.5% male, median age 5.1 years (1.3-17.5), 39.1% alveolar histology, 26.1%, 52.2%, 8.7%, and 13% patients with subgroup risk classification D, E/F/G, H, or metastatic, respectively, median total prescribed dose 55.8 Gy (50.4-56.4). Estimated 2-year local control, metastasis-free survival, event-free survival, and overall survival were 83.8%, 87.8%, 76.9%, and 88.9%, respectively. No acute or late local toxicity exceeding grade 3 was observed. Risk-group was identified as prognostic factor for metastasis-free survival in univariate analysis but not in multivariate analysis (trend: P = .09). In this cohort, dosimetric factors did not correlate with outcome. Isolated local failure happened in 5 of the 11 relapses. Local relapses were matched with dosimetry for 6 patients: 4 of them occurred in the high dose volume and 2 in the intermediate or low dose volume. CONCLUSIONS Proton therapy was effective and well feasible even in a critical cohort. Still, local relapse within the target volume of the radiation therapy remains an important issue in pRMS and new treatment strategies are needed.
Collapse
Affiliation(s)
- Jérôme Doyen
- Department of Particle Therapy, University Hospital Essen, West German Proton Therapy Centre Essen (WPE), West German Cancer Centre (WTZ), Germany; Department of Radiation Oncology, Centre Antoine-Lacassagne, University of Côte d'Azur, Fédération Claude Lalanne, Nice, France.
| | - Danny Jazmati
- Department of Particle Therapy, University Hospital Essen, West German Proton Therapy Centre Essen (WPE), West German Cancer Centre (WTZ), Germany
| | - Dirk Geismar
- Department of Particle Therapy, University Hospital Essen, West German Proton Therapy Centre Essen (WPE), West German Cancer Centre (WTZ), Germany, German Cancer Consortium (DKTK)
| | - Sabine Frisch
- Department of Particle Therapy, University Hospital Essen, West German Proton Therapy Centre Essen (WPE), West German Cancer Centre (WTZ), Germany
| | - Stefanie Schulze Schleithoff
- Department of Particle Therapy, University Hospital Essen, West German Proton Therapy Centre Essen (WPE), West German Cancer Centre (WTZ), Germany
| | - Xavier Vermeren
- West German Proton Therapy Centre Essen (WPE), West German Cancer Centre (WTZ), University Hospital Essen, Germany
| | - Monika Scheer
- Pediatrics 5 (Oncology, Hematology, Immunology), Olgahospital, Klinikum Stuttgart, Stuttgart, Germany; Cooperative Weichteilsarkomstudiengruppe (CWS) Olgahospital, Pädiatrisches Zentrum der Landeshauptstadt, Klinikum Stuttgart, Germany; Department of Pediatric and Oncology, University Hospital of Stuttgart, Germany
| | - Christoph Blase
- Department of Particle Therapy, University Hospital Essen, West German Proton Therapy Centre Essen (WPE), West German Cancer Centre (WTZ), Germany; AnästhesieNetz Rhein-Ruhr, Bochum, Germany
| | - Stephan Tippelt
- Department of Pediatric Oncology and Hematology, Pediatrics III, University Hospital Essen, Germany
| | - Beate Timmermann
- Department of Particle Therapy, University Hospital Essen, West German Proton Therapy Centre Essen (WPE), West German Cancer Centre (WTZ), Germany, German Cancer Consortium (DKTK)
| |
Collapse
|
45
|
Lawell MP, Bajaj BV, Gallotto SL, Hess CB, Patteson BE, Nartowicz JA, Giblin MJ, Kleinerman RA, Berrington de Gonzalez A, Ebb DH, Tarbell NJ, MacDonald SM, Weyman EA, Yock TI. Increased distance from a treating proton center is associated with diminished ability to follow patients enrolled on a multicenter radiation oncology registry. Radiother Oncol 2019; 134:25-29. [DOI: 10.1016/j.radonc.2019.01.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 12/10/2018] [Accepted: 01/09/2019] [Indexed: 10/27/2022]
|
46
|
Patterns of proton therapy use in pediatric cancer management in 2016: An international survey. Radiother Oncol 2019; 132:155-161. [DOI: 10.1016/j.radonc.2018.10.022] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 10/10/2018] [Accepted: 10/22/2018] [Indexed: 01/19/2023]
|
47
|
Ludmir EB, Grosshans DR, McAleer MF, McGovern SL, Harrison DJ, Okcu MF, Chintagumpala MM, Mahajan A, Paulino AC. Patterns of failure following proton beam therapy for head and neck rhabdomyosarcoma. Radiother Oncol 2019; 134:143-150. [PMID: 31005208 DOI: 10.1016/j.radonc.2019.02.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 01/30/2019] [Accepted: 02/03/2019] [Indexed: 12/15/2022]
Abstract
PURPOSE Pediatric patients with rhabdomyosarcoma (RMS) of the head and neck (H&N) are treated with multimodal therapy, often with radiotherapy (RT) as definitive local therapy. We report on the patterns of failure following proton beam therapy (PBT) for H&N RMS. METHODS Forty-six H&N RMS patients were enrolled on a prospective registry protocol between 2006 and 2015. All were treated with a combination of chemotherapy (ChT) and PBT. Most patients (25 patients, 54%) had parameningeal tumors, of which 11 (24%) had intracranial extension (ICE). Thirteen patients (28%) had primary tumors greater than 5 cm. Median total cyclophosphamide (CPM) equivalent dose was 13.2 g/m2 (range 0-16.8 g/m2). Median RT dose was 50.4 Gy(RBE) (range 36 Gy[RBE]-50.8 Gy[RBE]). RESULTS With median follow-up of 3.9 years, five-year overall survival was 76%, and five-year progression-free survival was 57%. Seventeen patients (37%) experienced relapse, including 7 with local failure (LF). Five-year local control (LC) was 84%. Tumor size greater than 5 cm predicted increased risk of LF (hazard ratio [HR] 6.49, p = 0.03), as did the presence of ICE at diagnosis (HR 5.21, p = 0.03). Six relapses occurred in patients with ICE; all included a component of central nervous system relapse, with leptomeningeal disease and/or LF with an intracranial component. Delayed RT delivery after week 4 of ChT predicted increased risk of relapse for ICE patients (HR 10.49, p = 0.006). CONCLUSIONS PBT confers excellent LC, and a favorable late toxicity profile as compared with prior photon RT data. Our observations support ongoing trial efforts to dose-escalate RT for patients with larger tumors. However, these data raise concerns regarding excess failures among patients with ICE.
Collapse
Affiliation(s)
- Ethan B Ludmir
- Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, United States
| | - David R Grosshans
- Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, United States
| | - Mary Frances McAleer
- Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, United States
| | - Susan L McGovern
- Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, United States
| | - Douglas J Harrison
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, United States
| | - M Fatih Okcu
- Department of Pediatrics, Texas Children's Cancer Center, Texas Children's Hospital, Baylor College of Medicine, Houston, United States
| | - Murali M Chintagumpala
- Department of Pediatrics, Texas Children's Cancer Center, Texas Children's Hospital, Baylor College of Medicine, Houston, United States
| | - Anita Mahajan
- Department of Radiation Oncology, Mayo Clinic, Rochester, United States
| | - Arnold C Paulino
- Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, United States.
| |
Collapse
|
48
|
Psoroulas S, Bula C, Actis O, Weber DC, Meer D. A predictive algorithm for spot position corrections after fast energy switching in proton pencil beam scanning. Med Phys 2018; 45:4806-4815. [DOI: 10.1002/mp.13217] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 08/21/2018] [Accepted: 09/19/2018] [Indexed: 11/09/2022] Open
Affiliation(s)
- Serena Psoroulas
- Centre for Proton Therapy Paul Scherrer Institut CH‐5232Villigen PSI Switzerland
| | - Christian Bula
- Centre for Proton Therapy Paul Scherrer Institut CH‐5232Villigen PSI Switzerland
| | - Oxana Actis
- Centre for Proton Therapy Paul Scherrer Institut CH‐5232Villigen PSI Switzerland
| | - Damien Charles Weber
- Centre for Proton Therapy Paul Scherrer Institut CH‐5232Villigen PSI Switzerland
| | - David Meer
- Centre for Proton Therapy Paul Scherrer Institut CH‐5232Villigen PSI Switzerland
| |
Collapse
|
49
|
La protonthérapie comme modalité d’irradiation dans les sarcomes des os ou cartilage et des tissus mous, état des lieux en 2018. Bull Cancer 2018; 105:830-838. [DOI: 10.1016/j.bulcan.2018.05.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Accepted: 05/14/2018] [Indexed: 01/06/2023]
|
50
|
Tang LY, Zhang MX, Lu DH, Chen YX, Liu ZG, Wu SG. The prognosis and effects of local treatment strategies for orbital embryonal rhabdomyosarcoma: a population-based study. Cancer Manag Res 2018; 10:1727-1734. [PMID: 29983592 PMCID: PMC6025768 DOI: 10.2147/cmar.s163932] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Introduction Orbital embryonal rhabdomyosarcoma is a rare childhood malignancy with a good prognosis, but the optimal treatment remains unclear. Using a population-based cancer registry, we assessed the prognoses and survival outcomes of patients with orbital embryonal rhabdomyosarcoma according to the local treatment strategy. Patients and methods Patients diagnosed with orbital embryonal rhabdomyosarcoma between 1988 and 2012 as part of the Surveillance Epidemiology and End Results program were included. Univariate and multivariate Cox regression analyses were performed to determine the prognostic factors associated with cause-specific survival (CSS) and overall survival (OS). Results In total, 102 patients were included; their median age was 6 years, 78.4% were white, and 56.9% were male. The median tumor size was 30 mm. Of 20 patients with an available histologic grade, the tumors of 90% were poorly differentiated/undifferentiated. Of 92 patients with available surgical and radiotherapy (RT) statuses, 50 (54.3%), 36 (39.1%), and 6 (6.5%) received surgery and RT, primary RT, and primary surgery, respectively. Ninety-five patients (93.1%) received chemotherapy. The 5- and 10-year CSSs of the entire cohort were 94.3% and 92.2%, respectively. The 5- and 10-year OSs were 93.3% and 91.3%, respectively. In 95 patients who were followed up for at least 12 months, there were no significant prognostic factors related to CSS and OS. Furthermore, the local treatment strategy did not significantly affect CSS (P=0.29) or OS (P=0.468). Conclusion There is no local treatment of choice for orbital embryonal rhabdomyosarcoma in terms of survival. However, RT is a reasonable alternative treatment to surgery.
Collapse
Affiliation(s)
- Li-Ying Tang
- Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Medical College, Xiamen University, Xiamen 361005, People's Republic of China,
| | - Mou-Xin Zhang
- Xiamen University Affiliated Xiamen Eye Center, Xiamen 361001, People's Republic of China,
| | - Di-Han Lu
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, People's Republic of China
| | - Yong-Xiong Chen
- Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Medical College, Xiamen University, Xiamen 361005, People's Republic of China,
| | - Zu-Guo Liu
- Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Medical College, Xiamen University, Xiamen 361005, People's Republic of China, .,Xiamen University Affiliated Xiamen Eye Center, Xiamen 361001, People's Republic of China,
| | - San-Gang Wu
- Department of Radiation Oncology, Xiamen Cancer Hospital, the First Affiliated Hospital of Xiamen University, Xiamen 361003, People's Republic of China,
| |
Collapse
|