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Wei JY, Ma LX, Liu WT, Dong LH, Hou X, Bao XY, Hou W. Mechanisms and protective measures for radiation-induced brachial plexus nerve injury. Brain Res Bull 2024; 210:110924. [PMID: 38460911 DOI: 10.1016/j.brainresbull.2024.110924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 02/06/2024] [Accepted: 03/06/2024] [Indexed: 03/11/2024]
Abstract
Radiation therapy is a common treatment modality for patients with malignant tumors of the head and neck, chest and axilla. However, radiotherapy inevitably causes damage to normal tissues at the irradiated site, among which damage to the brachial plexus nerve(BP) is a serious adverse effect in patients receiving radiation therapy in the scapular or axillary regions, with clinical manifestations including abnormal sensation, neuropathic pain, and dyskinesia, etc. These adverse effects seriously reduce the living quality of patients and pose obstacles to their prognosis. Therefore, it is important to elucidate the mechanism of radiation induced brachial plexus injury (RIBP) which remains unclear. Current studies have shown that the pathways of radiation-induced BP injury can be divided into two categories: direct injury and indirect injury, and the indirect injury is closely related to the inflammatory response, microvascular damage, cytokine production and other factors causing radiation-induced fibrosis. In this review, we summarize the underlying mechanisms of RIBP occurrence and possible effective methods to prevent and treat RIBP.
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Affiliation(s)
- Jia Ying Wei
- Department of Radiation Oncology, The First Hospital of Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Radiation Oncology & Therapy, The First Hospital of Jilin University, Changchun 130021, China
| | - Li Xin Ma
- Department of Radiation Oncology, The First Hospital of Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Radiation Oncology & Therapy, The First Hospital of Jilin University, Changchun 130021, China
| | - Wen Tong Liu
- Department of Radiation Oncology, The First Hospital of Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Radiation Oncology & Therapy, The First Hospital of Jilin University, Changchun 130021, China
| | - Li Hua Dong
- Department of Radiation Oncology, The First Hospital of Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Radiation Oncology & Therapy, The First Hospital of Jilin University, Changchun 130021, China
| | - Xue Hou
- Department of Radiation Oncology, The First Hospital of Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Radiation Oncology & Therapy, The First Hospital of Jilin University, Changchun 130021, China
| | - Xue Ying Bao
- Department of Radiation Oncology, The First Hospital of Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Radiation Oncology & Therapy, The First Hospital of Jilin University, Changchun 130021, China
| | - Wei Hou
- Department of Radiation Oncology, The First Hospital of Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Radiation Oncology & Therapy, The First Hospital of Jilin University, Changchun 130021, China.
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Bernard G, Bennassi A, Dereme J, Ozsahin M, Kinj R. [Re-irradiation of bone marrow compression on a focus of extra medullary hematopoiesis: Presentation of a case]. Cancer Radiother 2022; 27:158-162. [PMID: 35999161 DOI: 10.1016/j.canrad.2022.07.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 06/15/2022] [Accepted: 07/14/2022] [Indexed: 11/17/2022]
Abstract
We present the case of a 40-year-old patient with β-Thalassemia major who underwent decompressive palliative radiotherapy on symptomatic intracanal extra medullary hematopoiesis on three occasions between 2016 and 2020. We delivered normo-fractionated radiotherapy at a dose of 10Gy in five fractions on vertebrae T4 to T10 and L3 to S2, 20Gy in ten fractions on vertebrae C7 to T11, and 12Gy in six fractions on vertebrae C7 to T9. The treatment was well tolerated with complete recovery of the symptomatology during the first two irradiations, and almost complete recovery after the 3rd irradiation.
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Affiliation(s)
- G Bernard
- Service de radio-oncologie, centre hospitalier universitaire Vaudois (CHUV), rue du Bugnon 46, 1011 Lausanne, Suisse
| | - A Bennassi
- Service de radio-oncologie, centre hospitalier universitaire Vaudois (CHUV), rue du Bugnon 46, 1011 Lausanne, Suisse
| | - J Dereme
- Service d'hématologie, centre hospitalier universitaire Vaudois (CHUV), rue du Bugnon 46, 1011 Lausanne, Suisse
| | - M Ozsahin
- Service de radio-oncologie, centre hospitalier universitaire Vaudois (CHUV), rue du Bugnon 46, 1011 Lausanne, Suisse
| | - R Kinj
- Service de radio-oncologie, centre hospitalier universitaire Vaudois (CHUV), rue du Bugnon 46, 1011 Lausanne, Suisse.
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3
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[Radiation induced brachial plexopathy: Diagnosis, risk factors, principles of care]. Cancer Radiother 2022; 27:163-169. [PMID: 35995719 DOI: 10.1016/j.canrad.2022.06.010] [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: 02/10/2022] [Revised: 05/27/2022] [Accepted: 06/06/2022] [Indexed: 11/22/2022]
Abstract
Radiation plexitis, also known as radiation-induced brachial neuropathy is a rare toxicity following axillary, breast, cervical or thoracic radiotherapy, first described in 1966 by Stoll and Andrew. Although improvements in radiotherapy techniques have greatly reduced its risk over the past seventy years, its severe form remains a dreaded complication that is difficult to manage in patients with increased life expectancy. This article summarizes the epidemiological elements, risk factors, diagnostic methods, doses and constraints to be respected in radiotherapy and the treatment strategies of radiation plexitis.
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Larnaudie A, Marcy PY, Delaby N, Costes Martineau V, Troussier I, Bensadoun RJ, Vergez S, Servagi Vernat S, Thariat J. Radiotherapy of salivary gland tumours. Cancer Radiother 2021; 26:213-220. [PMID: 34953702 DOI: 10.1016/j.canrad.2021.08.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Primary tumours of the salivary glands account for about 5 to 10% of tumours of the head and neck. These tumours represent a multitude of situations and histologies, where surgery is the mainstay of treatment and radiotherapy is frequently needed for malignant tumours (in case of stage T3-T4, nodal involvement, extraparotid invasion, positive or close resection margins, histological high-grade tumour, lymphovascular or perineural invasion, bone involvement postoperatively, or unresectable tumours). The diagnosis relies on anatomic and functional MRI and ultrasound-guided fine-needle aspiration for the diagnostic of benign or malignant tumors. In addition to patient characteristics, the determination of primary and nodal target volumes depends on tumor extensions and stage, histology and grade. Therefore, radiotherapy of salivary gland tumors requires a certain degree of personalization, which has been codified in the recommendations of the French multidisciplinary network of expertise for rare ENT cancers (Refcor) and may justify a specialised multidisciplinary discussion. Although radiotherapy is usually recommended for malignant tumours only, recurrent pleomorphic adenomas may sometimes require radiotherapy based on multidisciplinary discussion. An update of indications and recommendations for radiotherapy for salivary gland tumours in terms of techniques, doses, target volumes and dose constraints to organs at risk of the French society for radiotherapy and oncology (SFRO) was reported in this article.
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Affiliation(s)
- A Larnaudie
- Département de radiothérapie, centre François-Baclesse, 3, avenue General-Harris, 14000 Caen, France; Service de radiothérapie, CHU de Dupuytren, 2, avenue Martin-Luther-King, 87000 Limoges, France
| | - P-Y Marcy
- Radiodiagnostic et radiologie interventionnelle, polyclinique Elsan, 332, avenue Frédéric-Mistral, 83190 Ollioules, France
| | - N Delaby
- Unité de physique médicale, centre Eugène-Marquis, 35000 Rennes cedex, France
| | - V Costes Martineau
- Service d'anatomie pathologique, CHU de Montpellier, 34000 Montpellier, France; Réseau d'expertise français sur les cancers ORL rares (Refcor), 94800 Villejuif, France
| | - I Troussier
- Service de radiothérapie, centre de haute énergie, 06000 Nice, France
| | - R-J Bensadoun
- Réseau d'expertise français sur les cancers ORL rares (Refcor), 94800 Villejuif, France; Service de radiothérapie, centre de haute énergie, 06000 Nice, France
| | - S Vergez
- Réseau d'expertise français sur les cancers ORL rares (Refcor), 94800 Villejuif, France; Service d'ORL et chirurgie cervicofaciale, CHU de Toulouse/oncopôle, 31000 Toulouse, France
| | - S Servagi Vernat
- Institut privé de radiothérapie, clinique Claude-Bernard, 97, rue Claude-Bernard, 57070 Metz, France
| | - J Thariat
- Département de radiothérapie, centre François-Baclesse, 3, avenue General-Harris, 14000 Caen, France; Normandie université, 14000 Caen, France; Réseau d'expertise français sur les cancers ORL rares (Refcor), 94800 Villejuif, France; Groupe d'oncologie radiothérapie des cancers de la tête et du cou (Gortec), 37000 Tours, France.
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Patel G, Mandal A, Choudhary S, Mishra R, Shahi U, Mishra H. Myths, facts and scope of spinal cord tolerance dose revision in Intensity modulated SIB treatment of locally advanced head and neck cancer: A dosimetrical and radiobiological demonstration. Cancer Radiother 2020; 25:8-12. [PMID: 33293203 DOI: 10.1016/j.canrad.2020.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 05/02/2020] [Accepted: 05/09/2020] [Indexed: 11/28/2022]
Abstract
PURPOSE To explore the possibility of revising the spinal cord tolerance dose in Simultaneously Integrated Boost (SIB) intensity modulated treatment plan of locally advanced head and neck (H&N) cancer and assessment of achieved planning gain due to the revision. In SIB regimen, the Organ at Risk (OARs) tolerance dose is equally distributed throughout the treatment. Clinicians have usually considered the spinal cord tolerance to be the same as in conventional technique. However, in SIB fractionation regimen with intensity modulation treatment, the spinal cord may receive a physical dose of 45Gy, with much lesser dose per fraction than 2Gy per fraction. So when the dose of spinal cord is distributed throughout the treatment, the tolerance dose limit of physical dose can be considered higher than the usual conventional dose limits. In this study, an attempt has been made to explore the possibilities of dose escalation and treatment planning benefits while exploiting this "Window of Opportunity (WoO)" of increase in spinal cord and Planning Risk Volume (PRV) spinal cord tolerance dose. MATERIAL AND METHODS A total of 12 patients CT data set along with approved structure set of H&N cancer used for treatment planning in. Three independent SIB VMAT plans named as SPC, SPR and SPDE were generated for the 12 patients. First plan (SPC) was generated by considering standard spinal cord tissue constraint of maximum dose of 45Gy and PRV spinal cord maximum dose 50Gy as per QUANTEC summary and second plan (SPR) was generated considering spinal cord tissue constraint of maximum dose 52.50Gy and PRV spinal cord maximum dose 56.35Gy while optimization and dose calculation. The objectives for rest of the Organ at Risk (OAR) were kept same in both the plans during optimization and dose calculation. The SPC plan was copied for creation of third plan (SPDE) in which dose was escalated by increasing dose per fraction for target volumes such that dose to spinal cord reached a maximum dose of 52.50Gy and PRV spinal cord maximum dose of 56.35Gy. In this plan there have been changes to only dose per fraction, however dose optimization and dose calculation have not been performed. Radiobiological parameters TCP and NTCP were also calculated by using indigenously developed software. RESULTS Considering the increase of spinal cord tolerance dose as "window of opportunity", a sufficient escalation in physical dose, Biological Effective Dose (BED) and Tumor Control Probability (TCP) was observed for all target volumes with acceptable level of NTCP values. CONCLUSION Sufficient dose escalation and increased in TCP for target volumes or effective planning benefits can be achieved by revising the spinal cord tolerance dose in intensity modulated SIB treatment of locally advanced H&N cancers.
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Affiliation(s)
- G Patel
- Department of Radiotherapy and Radiation Medicine, Institute of Medical Sciences, BHU, Varanasi, India.
| | - A Mandal
- Department of Radiotherapy and Radiation Medicine, Institute of Medical Sciences, BHU, Varanasi, India.
| | - S Choudhary
- Department of Radiotherapy and Radiation Medicine, Institute of Medical Sciences, BHU, Varanasi, India.
| | - R Mishra
- Department of Radiotherapy and Radiation Medicine, Institute of Medical Sciences, BHU, Varanasi, India.
| | - U Shahi
- Department of Radiotherapy and Radiation Medicine, Institute of Medical Sciences, BHU, Varanasi, India.
| | - H Mishra
- Department of Radiotherapy and Radiation Medicine, Institute of Medical Sciences, BHU, Varanasi, India.
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Lapeyre M, Biau J, Miroir J, Moreau J, Gleyzolle B, Brun L, Racadot S, Graff-Cailleaud P. [Concurrent chemoradiotherapy for head neck cancers. Should organs at risk dose constraints be revisited ?]. Cancer Radiother 2020; 24:586-593. [PMID: 32861607 DOI: 10.1016/j.canrad.2020.07.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 07/02/2020] [Accepted: 07/08/2020] [Indexed: 01/16/2023]
Abstract
Concurrent chemoradiotherapy improves the outcome of locally advanced head and neck cancers and the current reference chemotherapy is cisplatin. These results are obtained at the cost of increased toxicities. To limit the risk of toxicity, organ at riskdose constraints have been established starting with 2D radiotherapy, then 3D radiotherapy and intensity-modulated radiotherapy. Regarding grade ≥3 acute toxicities, the scientific literature attests that concurrent chemoradiotherapy significantly increases risks of mucositis and dysphagia. Constraints applied to the oral mucosa volume excluding the planning target volume, the pharyngeal constrictor muscles and the larynx limit this adverse impact. Regarding late toxicity, concurrent chemoradiotherapy increases significantly the risk of postoperative neck fibrosis and hearing loss. However, for some organs at risk, concurrent chemotherapy appears to increase late radiation induced effect, even though the results are less marked (brachial plexus, mandible, pharyngeal constrictor muscles, parotid gland). This additional adverse impact of concomitant chemotherapy may be notable only when organs at risk receive less than their usual dose thresholds and this would be vanished when those thresholds are exceeded as seems to be the situation for the parotid glands. Until the availability of more robust data, it seems appropriate to apply the principle of delivering dose to organs at risk as low as reasonably achievable.
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Affiliation(s)
- M Lapeyre
- Département de radiothérapie, centre Jean-Perrin, 58, rue Montalembert, BP 5026, 63011 Clermont-Ferrand Cedex 1, France.
| | - J Biau
- Département de radiothérapie, centre Jean-Perrin, 58, rue Montalembert, BP 5026, 63011 Clermont-Ferrand Cedex 1, France
| | - J Miroir
- Département de radiothérapie, centre Jean-Perrin, 58, rue Montalembert, BP 5026, 63011 Clermont-Ferrand Cedex 1, France
| | - J Moreau
- Département de radiothérapie, centre Jean-Perrin, 58, rue Montalembert, BP 5026, 63011 Clermont-Ferrand Cedex 1, France
| | - B Gleyzolle
- Département de radiothérapie, centre Jean-Perrin, 58, rue Montalembert, BP 5026, 63011 Clermont-Ferrand Cedex 1, France
| | - L Brun
- Département de radiothérapie, centre Jean-Perrin, 58, rue Montalembert, BP 5026, 63011 Clermont-Ferrand Cedex 1, France
| | - S Racadot
- Département de radiothérapie, centre Léon-Bérard, 28, rue Laennec, 69008 Lyon, France
| | - P Graff-Cailleaud
- Département de radiothérapie, institut universitaire du cancer de Toulouse, 1, avenue Irene Joliot-Curie, 31100 Toulouse, France
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7
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Graff P, Blanchard P, Thariat J, Racadot S, Lapeyre M. [Post-treatment follow-up of head and neck cancer patients]. Cancer Radiother 2019; 23:576-580. [PMID: 31422000 DOI: 10.1016/j.canrad.2019.06.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Accepted: 06/26/2019] [Indexed: 12/13/2022]
Abstract
Post-therapeutic follow-up of patients with head and neck cancer involves numerous professionals. The radiation oncologist should play an active role in this process. His oncological knowledge and technical expertise position him as a cornerstone for the detection of recurrences from the treated tumor, the research of second primary cancers and the screening of potential side-effects induced by the different treatments administered. To improve the benefits/costs ratio and allow good patient-compliance, follow-up programs should be built through close collaboration between the different contributors and planned according to a feasible schedule. Paraclinical exams must be arranged to respond to accurate objectives. Patient-education is essential to ensure the patient's full understanding and active participation. Finally, the transfer of the long-term follow-up of cancer survivors from specialists to primary care physicians is relevant but would require a prospective evaluation of its efficiency for this specific population.
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Affiliation(s)
- P Graff
- Département de radiothérapie, institut universitaire du cancer de Toulouse-Oncopole, 1, avenue Irène-Joliot-Curie, 31059 Toulouse, France.
| | - P Blanchard
- Département de radiothérapie, institut Gustave-Roussy, 114, rue Édouard-Vaillant, 94800 Villejuif, France
| | - J Thariat
- Département de radiothérapie, centre François-Baclesse, 3, avenue du Général-Harris, 14000 Caen, France
| | - S Racadot
- Département de radiothérapie, centre Léon-Bérard, 28, rue Laennec, 69008 Lyon, France
| | - M Lapeyre
- Département de radiothérapie, centre Jean-Perrin, 58, rue Montalembert, 63011 Clermont-Ferrand, France
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Kinj R, Bénézery K, Florescu C, Gery B, Habrand JL, Thariat J. [Re-irradiation of head and neck cancers: Target volumes, technical evolutions and prospects]. Cancer Radiother 2018; 22:171-179. [PMID: 29428789 DOI: 10.1016/j.canrad.2017.09.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Revised: 08/02/2017] [Accepted: 09/15/2017] [Indexed: 12/11/2022]
Abstract
Malignant tumors of the head and neck have a predominantly regional recurrence pattern, with most deaths resulting from this progression. Optimization of re-radiation in recurrence setting is a major objective for these patients. Extensive research has been carried out with the PubMed search engine to find publications dealing with this topic. The first attempts to reirradiate the ORL sphere date back to the 1980s and the first to be performed by intensity modulation conformational radiotherapy (IMRT) date back to the late 1990s. Compared to 3 dimensional conformal radiotherapy, IMRT improves clinical outcomes and reduces toxicity. In IMRT series, associated or not with concomitant chemotherapy, the locoregional control obtained at 2 years was of the order of 45 to 65% and the overall survival of 15 to 60%, depending on predictive factors. Grade 3 acute toxicity occurred on the order of 10 to 30% and late-grade 3 toxicity on the order of 15 to 50%. In a selected population with low volumes tumors, stereotactic re-irradiation at a minimum dose of 35Gy obtained outcome comparable to IMRT. Re-irradiation of head and neck tumors by proton therapy is rare. The toxicity rate appears to be lower than that usually seen after photon therapy. However, we do not have a long follow-up. This technique therefore remains reserved for search protocols and represents a future perspective in these situations.
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Affiliation(s)
- R Kinj
- Service de radiothérapie, centre Antoine-Lacassagne, 33, avenue de Valombrose, 06189 Nice, France.
| | - K Bénézery
- Service de radiothérapie, centre Antoine-Lacassagne, 33, avenue de Valombrose, 06189 Nice, France
| | - C Florescu
- Service de radiothérapie, centre de lutte contre le cancer François-Baclesse, 3, avenue du Général-Harris, 14000 Caen, France
| | - B Gery
- Service de radiothérapie, centre de lutte contre le cancer François-Baclesse, 3, avenue du Général-Harris, 14000 Caen, France
| | - J L Habrand
- Service de radiothérapie, centre de lutte contre le cancer François-Baclesse, 3, avenue du Général-Harris, 14000 Caen, France
| | - J Thariat
- Service de radiothérapie, centre de lutte contre le cancer François-Baclesse, 3, avenue du Général-Harris, 14000 Caen, France
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Brennan P, Bradley K, Brands M. Intensity-modulated radiotherapy in head and neck cancer — an update for oral and maxillofacial surgeons. Br J Oral Maxillofac Surg 2017; 55:770-774. [DOI: 10.1016/j.bjoms.2017.07.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 07/31/2017] [Indexed: 01/16/2023]
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10
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Biau J, Miroir J, Millardet C, Saroul N, Pham-Dang N, Racadot S, Huguet F, Kwiatkowski F, Pereira B, Bourhis J, Lapeyre M. [Description of the GORTEC 2017-03 study: Postoperative stereotactic radiotherapy for early stage oropharyngeal and oral cavity cancer with high risk margin (PHRC-K-16-164)]. Cancer Radiother 2017; 21:527-532. [PMID: 28865970 DOI: 10.1016/j.canrad.2017.07.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 07/16/2017] [Accepted: 07/19/2017] [Indexed: 12/20/2022]
Abstract
The GORTEC 2017-03-Stereo-postop study is a phase 2, multicentric, nationwide study, funded by the hospital clinical research program (PHRC). The sponsor is Centre Jean-Perrin in Clermont-Ferrand, in partnership with the GORTEC. The principal investigators are Dr J Biau and Dr M Lapeyre. The main objective is to study severe late toxicity of postoperative stereotactic radiotherapy (6×6Gy) for early stage oropharyngeal and oral cavity cancer with high risk margins. The secondary objectives include acute toxicity, efficacy, nutritional impact and quality of life. The population is adult patients, with pT1 or pT2 squamous cell carcinoma of the oropharynx or oral cavity (except lips), without indication of neck irradiation or concomitant chemotherapy, with at risk margin (R1, less than 5mm or uncertain). Ninety patients will be included over a 2-year period; this was calculated to limit the rate of 2-year severe toxicity at 5 to 15%, with a 2-year local control of at least 80 to 90%. If this study is considered as positive, stereotactic radiotherapy (6×6Gy) could become the third therapeutic option, with brachytherapy and normofractionated intensity-modulated radiotherapy (IMRT), for postoperative irradiation of oropharyngeal and oral cavity cancer with high risk margins.
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Affiliation(s)
- J Biau
- Département de radiothérapie, centre Jean-Perrin, 58, rue Montalembert, 63011 Clermont-Ferrand, France.
| | - J Miroir
- Département de radiothérapie, centre Jean-Perrin, 58, rue Montalembert, 63011 Clermont-Ferrand, France
| | - C Millardet
- Département de physique médicale, centre Jean-Perrin, 58, rue Montalembert, 63011 Clermont-Ferrand, France
| | - N Saroul
- Département d'ORL-CCF, CHU Gabriel-Montpied, 58, rue Montalembert, 63011 Clermont-Ferrand, France
| | - N Pham-Dang
- Département de chirurgie maxillo-faciale, CHU Estaing, 1, rue Lucie-Aubrac, 63100 Clermont-Ferrand, France
| | - S Racadot
- Département de radiothérapie, centre Léon-Bérard, 28, rue Laennec, 69008 Lyon, France
| | - F Huguet
- Département de radiothérapie, hôpital Tenon-AP-HP, 4, rue de la Chine, 75020 Paris, France
| | - F Kwiatkowski
- Département de recherche clinique, centre Jean-Perrin, 58, rue Montalembert, 63011 Clermont-Ferrand, France
| | - B Pereira
- Département de biostatistiques, DRCI, CHU Clermont-Ferrand, 63003 Clermont-Ferrand, France
| | - J Bourhis
- Département de radiothérapie, CHUV, 1011 Lausanne, Suisse
| | - M Lapeyre
- Département de radiothérapie, centre Jean-Perrin, 58, rue Montalembert, 63011 Clermont-Ferrand, France
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