Publication date: Available online 18 August 2017
Source:Cancer/Radiothérapie
Author(s): J. Doyen, D. Lam Cham Kee, L. Krebs, J. Guigay, O. Dassonville, F. Peyrade, G. Poissonnet, E. Saâda-Bouzid, A. Sudaka, A. Bozec, K. Bénézery
La rechute locorégionale en territoire irradié des cancers des voies aérodigestives supérieures est de pronostic défavorable, aussi bien locorégionalement qu'à distance. La réirradiation est souvent proposée soit de façon exclusive, soit associée à une chimiothérapie, et parfois après une chirurgie de rattrapage en fonction des facteurs histopronostiques. Les données de toxicité de la réirradiation sont acceptables étant donné le pronostic défavorable. Des schémas d'irradiation hyperfractionnés avec split course ou normofractionnés sans split course sont possibles, avec une efficacité semble-t-il similaire. Si le volume tumoral est réduit, une réirradiation stéréotaxique peut être proposée. Enfin, si le centre de traitement est équipé de protonthérapie, cette technique pourrait être envisagée pour apporter une meilleure protection des tissus sains. Il n'y a pas de standards actuels concernant le mode de réirradiation et dans ce contexte, des essais sont nécessaires afin de déterminer la meilleure technique d'irradiation. En revanche, on s'accorde pour recommander une dose totale avoisinant les 60Gy (à raison de 2Gy par fraction). D'autres essais analysant l'association avec de nouvelles chimiothérapies pourraient être d'intérêt, notamment avec les anti-PD1/PD-L1.Locoregional relapse in previously irradiated region for head and neck tumours is associated with a bad locoregional and distant prognosis. Reirradiation might be exclusive, or feasible in addition with surgery and/or chemotherapy, according to histopronostic factors. Data show that reirradiation is feasible with some severe toxicity due to the bad prognosis of this situation. Hyperfractionnated regimen with split course or normofractionnated regimen without split course are possible with similar efficacy. If tumour size is small, stereotactic ablative radiotherapy may be considered, and if the treatment centre has proton therapy, it could be proposed because of better organs at risk sparing. There is no standard regarding reirradiation schedules and several trials have to be done in order to determine the best technique. Nevertheless, it is agreed that a total dose of 60Gy (2Gy per fraction) is needed. Other trials testing the association with new systemic agents have to be performed, among them agents targeting the PD1/PD-L1 axis.
from #ORL-AlexandrosSfakianakis via ola Kala on Inoreader http://ift.tt/2wbCFDN
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